/*
 * window.c - the PuTTY(tel) main program, which runs a PuTTY terminal
 * emulator and backend in a window.
 */

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <time.h>
#include <limits.h>
#include <assert.h>

#ifndef NO_MULTIMON
#define COMPILE_MULTIMON_STUBS
#endif

#define PUTTY_DO_GLOBALS	       /* actually _define_ globals */
#include "putty.h"
#include "terminal.h"
#include "storage.h"
#include "win_res.h"

#ifndef NO_MULTIMON
#include <multimon.h>
#endif

#include <imm.h>
#include <commctrl.h>
#include <richedit.h>
#include <mmsystem.h>

/* From MSDN: In the WM_SYSCOMMAND message, the four low-order bits of
 * wParam are used by Windows, and should be masked off, so we shouldn't
 * attempt to store information in them. Hence all these identifiers have
 * the low 4 bits clear. Also, identifiers should < 0xF000. */

#define IDM_SHOWLOG   0x0010
#define IDM_NEWSESS   0x0020
#define IDM_DUPSESS   0x0030
#define IDM_RESTART   0x0040
#define IDM_RECONF    0x0050
#define IDM_CLRSB     0x0060
#define IDM_RESET     0x0070
#define IDM_HELP      0x0140
#define IDM_ABOUT     0x0150
#define IDM_SAVEDSESS 0x0160
#define IDM_COPYALL   0x0170
#define IDM_FULLSCREEN	0x0180
#define IDM_PASTE     0x0190
#define IDM_SPECIALSEP 0x0200

#define IDM_SPECIAL_MIN 0x0400
#define IDM_SPECIAL_MAX 0x0800

#define IDM_SAVED_MIN 0x1000
#define IDM_SAVED_MAX 0x5000
#define MENU_SAVED_STEP 16
/* Maximum number of sessions on saved-session submenu */
#define MENU_SAVED_MAX ((IDM_SAVED_MAX-IDM_SAVED_MIN) / MENU_SAVED_STEP)

#define WM_IGNORE_CLIP (WM_APP + 2)
#define WM_FULLSCR_ON_MAX (WM_APP + 3)
#define WM_AGENT_CALLBACK (WM_APP + 4)
#define WM_GOT_CLIPDATA (WM_APP + 6)

/* Needed for Chinese support and apparently not always defined. */
#ifndef VK_PROCESSKEY
#define VK_PROCESSKEY 0xE5
#endif

/* Mouse wheel support. */
#ifndef WM_MOUSEWHEEL
#define WM_MOUSEWHEEL 0x020A	       /* not defined in earlier SDKs */
#endif
#ifndef WHEEL_DELTA
#define WHEEL_DELTA 120
#endif

static Mouse_Button translate_button(Mouse_Button button);
static LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
static int TranslateKey(UINT message, WPARAM wParam, LPARAM lParam,
                        unsigned char *output);
static void cfgtopalette(void);
static void systopalette(void);
static void init_palette(void);
static void init_fonts(int, int);
static void another_font(int);
static void deinit_fonts(void);
static void set_input_locale(HKL);
static void update_savedsess_menu(void);
static void init_flashwindow(void);

static int is_full_screen(void);
static void make_full_screen(void);
static void clear_full_screen(void);
static void flip_full_screen(void);
static int process_clipdata(HGLOBAL clipdata, int unicode);

/* Window layout information */
static void reset_window(int);
static int extra_width, extra_height;
static int font_width, font_height, font_dualwidth, font_varpitch;
static int offset_width, offset_height;
static int was_zoomed = 0;
static int prev_rows, prev_cols;

static int pending_netevent = 0;
static WPARAM pend_netevent_wParam = 0;
static LPARAM pend_netevent_lParam = 0;
static void enact_pending_netevent(void);
static void flash_window(int mode);
static void sys_cursor_update(void);
static int get_fullscreen_rect(RECT *ss);

static int caret_x = -1, caret_y = -1;

static int kbd_codepage;

static void *ldisc;
static Backend *back;
static void *backhandle;

static struct unicode_data ucsdata;
static int must_close_session, session_closed;
static int reconfiguring = FALSE;

static const struct telnet_special *specials = NULL;
static HMENU specials_menu = NULL;
static int n_specials = 0;

static wchar_t *clipboard_contents;
static size_t clipboard_length;

#define TIMING_TIMER_ID 1234
static long timing_next_time;

static struct
{
    HMENU menu;
} popup_menus[2];
enum
{
    SYSMENU, CTXMENU
};
static HMENU savedsess_menu;

Config cfg; /* exported to windlg.c */

static struct sesslist sesslist; /* for saved-session menu */

struct agent_callback
{
    void (*callback)(void *, void *, int);
    void *callback_ctx;
    void *data;
    int len;
};

#define FONT_NORMAL 0
#define FONT_BOLD 1
#define FONT_UNDERLINE 2
#define FONT_BOLDUND 3
#define FONT_WIDE	0x04
#define FONT_HIGH	0x08
#define FONT_NARROW	0x10

#define FONT_OEM 	0x20
#define FONT_OEMBOLD 	0x21
#define FONT_OEMUND 	0x22
#define FONT_OEMBOLDUND 0x23

#define FONT_MAXNO 	0x2F
#define FONT_SHIFT	5
static HFONT fonts[FONT_MAXNO];
static LOGFONT lfont;
static int fontflag[FONT_MAXNO];
static enum
{
    BOLD_COLOURS, BOLD_SHADOW, BOLD_FONT
} bold_mode;
static enum
{
    UND_LINE, UND_FONT
} und_mode;
static int descent;

#define NCFGCOLOURS 22
#define NEXTCOLOURS 240
#define NALLCOLOURS (NCFGCOLOURS + NEXTCOLOURS)
static COLORREF colours[NALLCOLOURS];
static HPALETTE pal;
static LPLOGPALETTE logpal;
static RGBTRIPLE defpal[NALLCOLOURS];

static HBITMAP caretbm;

static int dbltime, lasttime, lastact;
static Mouse_Button lastbtn;

/* this allows xterm-style mouse handling. */
static int send_raw_mouse = 0;
static int wheel_accumulator = 0;

static int busy_status = BUSY_NOT;

static char *window_name, *icon_name;

static int compose_state = 0;

static UINT wm_mousewheel = WM_MOUSEWHEEL;

/* Dummy routine, only required in plink. */
void ldisc_update(void *frontend, int echo, int edit)
{
}

char *get_ttymode(void *frontend, const char *mode)
{
    return term_get_ttymode(term, mode);
}

static void start_backend(void)
{
    const char *error;
    char msg[1024], *title;
    char *realhost;
    int i;

    /*
     * Select protocol. This is farmed out into a table in a
     * separate file to enable an ssh-free variant.
     */
    back = backend_from_proto(cfg.protocol);
    if (back == NULL)
    {
        char *str = dupprintf("%s Internal Error", appname);
        MessageBox(NULL, "Unsupported protocol number found", str,
                   MB_OK | MB_ICONEXCLAMATION);
        sfree(str);
        cleanup_exit(1);
    }

    error = back->init(NULL, &backhandle, &cfg, cfg.host, cfg.port, &realhost,
                       cfg.tcp_nodelay, cfg.tcp_keepalives);
    back->provide_logctx(backhandle, logctx);
    if (error)
    {
        char *str = dupprintf("%s Error", appname);
        sprintf(msg, "Unable to open connection to\n"
                "%.800s\n" "%s", cfg_dest(&cfg), error);
        MessageBox(NULL, msg, str, MB_ICONERROR | MB_OK);
        sfree(str);
        exit(0);
    }
    window_name = icon_name = NULL;
    if (*cfg.wintitle)
    {
        title = cfg.wintitle;
    }
    else
    {
        sprintf(msg, "%s - %s", realhost, appname);
        title = msg;
    }
    sfree(realhost);
    set_title(NULL, title);
    set_icon(NULL, title);

    /*
     * Connect the terminal to the backend for resize purposes.
     */
    term_provide_resize_fn(term, back->size, backhandle);

    /*
     * Set up a line discipline.
     */
    ldisc = ldisc_create(&cfg, term, back, backhandle, NULL);

    /*
     * Destroy the Restart Session menu item. (This will return
     * failure if it's already absent, as it will be the very first
     * time we call this function. We ignore that, because as long
     * as the menu item ends up not being there, we don't care
     * whether it was us who removed it or not!)
     */
    for (i = 0; i < lenof(popup_menus); i++)
    {
        DeleteMenu(popup_menus[i].menu, IDM_RESTART, MF_BYCOMMAND);
    }

    must_close_session = FALSE;
    session_closed = FALSE;
}

static void close_session(void)
{
    char morestuff[100];
    int i;

    session_closed = TRUE;
    sprintf(morestuff, "%.70s (inactive)", appname);
    set_icon(NULL, morestuff);
    set_title(NULL, morestuff);

    if (ldisc)
    {
        ldisc_free(ldisc);
        ldisc = NULL;
    }
    if (back)
    {
        back->free(backhandle);
        backhandle = NULL;
        back = NULL;
        term_provide_resize_fn(term, NULL, NULL);
        update_specials_menu(NULL);
    }

    /*
     * Show the Restart Session menu item. Do a precautionary
     * delete first to ensure we never end up with more than one.
     */
    for (i = 0; i < lenof(popup_menus); i++)
    {
        DeleteMenu(popup_menus[i].menu, IDM_RESTART, MF_BYCOMMAND);
        InsertMenu(popup_menus[i].menu, IDM_DUPSESS, MF_BYCOMMAND | MF_ENABLED,
                   IDM_RESTART, "&Restart Session");
    }

    /*
     * Unset the 'must_close_session' flag, or else we'll come
     * straight back here the next time we go round the main message
     * loop - which, worse still, will be immediately (without
     * blocking) because we've just triggered a WM_SETTEXT by the
     * window title change above.
     */
    must_close_session = FALSE;
}

int WINAPI WinMain(HINSTANCE inst, HINSTANCE prev, LPSTR cmdline, int show)
{
    WNDCLASS wndclass;
    MSG msg;
    HRESULT hr;
    int guess_width, guess_height;

    hinst = inst;
    hwnd = NULL;
    flags = FLAG_VERBOSE | FLAG_INTERACTIVE;

    sk_init();

    InitCommonControls();



    if (!init_winver())
    {
        char *str = dupprintf("%s Fatal Error", appname);
        MessageBox(NULL, "Windows refuses to report a version", str,
                   MB_OK | MB_ICONEXCLAMATION);
        sfree(str);
        return 1;
    }

    /*
     * If we're running a version of Windows that doesn't support
     * WM_MOUSEWHEEL, find out what message number we should be
     * using instead.
     */
    if (osVersion.dwMajorVersion < 4
            || (osVersion.dwMajorVersion == 4
                && osVersion.dwPlatformId != VER_PLATFORM_WIN32_NT))
        wm_mousewheel = RegisterWindowMessage("MSWHEEL_ROLLMSG");

    //    init_help();

    init_flashwindow();

    /*
     * Initialize COM.
     */
    hr = CoInitialize(NULL);
    if (hr != S_OK && hr != S_FALSE)
    {
        char *str = dupprintf("%s Fatal Error", appname);
        MessageBox(NULL, "Failed to initialize COM subsystem", str,
                   MB_OK | MB_ICONEXCLAMATION);
        sfree(str);
        return 1;
    }

    /*
     * Process the command line.
     */
    {
        char *p;
        int got_host = 0;
        /* By default, we bring up the config dialog, rather than launching
         * a session. This gets set to TRUE if something happens to change
         * that (e.g., a hostname is specified on the command-line). */
        int allow_launch = FALSE;

        default_protocol = be_default_protocol;
        /* Find the appropriate default port. */
        {
            Backend *b = backend_from_proto(default_protocol);
            default_port = 0; /* illegal */
            if (b)
                default_port = b->default_port;
        }
        cfg.logtype = LGTYP_NONE;

        do_defaults(NULL, &cfg);

        p = cmdline;

        /*
         * Process a couple of command-line options which are more
         * easily dealt with before the line is broken up into words.
         * These are the old-fashioned but convenient @sessionname and
         * the internal-use-only &sharedmemoryhandle, neither of which
         * are combined with anything else.
         */
        while (*p && isspace(*p))
            p++;
        if (*p == '@')
        {
            /*
             * An initial @ means that the whole of the rest of the
             * command line should be treated as the name of a saved
             * session, with _no quoting or escaping_. This makes it a
             * very convenient means of automated saved-session
             * launching, via IDM_SAVEDSESS or Windows 7 jump lists.
             */
            int i = strlen(p);
            while (i > 1 && isspace(p[i - 1]))
                i--;
            p[i] = '\0';
            do_defaults(p + 1, &cfg);
            if (!cfg_launchable(&cfg))
            {
                cleanup_exit(0);
            }
            allow_launch = TRUE; /* allow it to be launched directly */
        }


        cmdline_run_saved(&cfg);

        if (loaded_session || got_host)
            allow_launch = TRUE;

        if ((!allow_launch || !cfg_launchable(&cfg)))
        {
            cleanup_exit(0);
        }

        /*
         * Trim leading whitespace off the hostname if it's there.
         */
        {
            int space = strspn(cfg.host, " \t");
            memmove(cfg.host, cfg.host + space, 1 + strlen(cfg.host) - space);
        }

        /* See if host is of the form user@host */
        if (cfg.host[0] != '\0')
        {
            char *atsign = strrchr(cfg.host, '@');
            /* Make sure we're not overflowing the user field */
            if (atsign)
            {
                if (atsign - cfg.host < sizeof cfg.username)
                {
                    strncpy(cfg.username, cfg.host, atsign - cfg.host);
                    cfg.username[atsign - cfg.host] = '\0';
                }
                memmove(cfg.host, atsign + 1, 1 + strlen(atsign + 1));
            }
        }

        /*
         * Trim a colon suffix off the hostname if it's there. In
         * order to protect IPv6 address literals against this
         * treatment, we do not do this if there's _more_ than one
         * colon.
         */
        {
            char *c = strchr(cfg.host, ':');

            if (c)
            {
                char *d = strchr(c + 1, ':');
                if (!d)
                    *c = '\0';
            }
        }

        /*
         * Remove any remaining whitespace from the hostname.
         */
        {
            int p1 = 0, p2 = 0;
            while (cfg.host[p2] != '\0')
            {
                if (cfg.host[p2] != ' ' && cfg.host[p2] != '\t')
                {
                    cfg.host[p1] = cfg.host[p2];
                    p1++;
                }
                p2++;
            }
            cfg.host[p1] = '\0';
        }
    }

    if (!prev)
    {
        wndclass.style = 0;
        wndclass.lpfnWndProc = WndProc;
        wndclass.cbClsExtra = 0;
        wndclass.cbWndExtra = 0;
        wndclass.hInstance = inst;
        wndclass.hIcon = LoadIcon(inst, MAKEINTRESOURCE(IDI_MAINICON));
        wndclass.hCursor = LoadCursor(NULL, IDC_IBEAM);
        wndclass.hbrBackground = NULL;
        wndclass.lpszMenuName = NULL;
        wndclass.lpszClassName = appname;

        RegisterClass(&wndclass);
    }

    memset(&ucsdata, 0, sizeof(ucsdata));

    cfgtopalette();

    /*
     * Guess some defaults for the window size. This all gets
     * updated later, so we don't really care too much. However, we
     * do want the font width/height guesses to correspond to a
     * large font rather than a small one...
     */

    font_width = 10;
    font_height = 20;
    extra_width = 25;
    extra_height = 28;
    guess_width = extra_width + font_width * cfg.width;
    guess_height = extra_height + font_height * cfg.height;
    {
        RECT r;
        get_fullscreen_rect(&r);
        if (guess_width > r.right - r.left)
            guess_width = r.right - r.left;
        if (guess_height > r.bottom - r.top)
            guess_height = r.bottom - r.top;
    }

    {
        int winmode = WS_OVERLAPPEDWINDOW | WS_VSCROLL;
        int exwinmode = 0;
        if (!cfg.scrollbar)
            winmode &= ~(WS_VSCROLL);
        if (cfg.resize_action == RESIZE_DISABLED)
            winmode &= ~(WS_THICKFRAME | WS_MAXIMIZEBOX);
        if (cfg.alwaysontop)
            exwinmode |= WS_EX_TOPMOST;
        if (cfg.sunken_edge)
            exwinmode |= WS_EX_CLIENTEDGE;
        hwnd = CreateWindowEx(exwinmode, appname, appname, winmode,
                              CW_USEDEFAULT, CW_USEDEFAULT, guess_width, guess_height, NULL,
                              NULL, inst, NULL);
    }

    /*
     * Initialise the terminal. (We have to do this _after_
     * creating the window, since the terminal is the first thing
     * which will call schedule_timer(), which will in turn call
     * timer_change_notify() which will expect hwnd to exist.)
     */
    term = term_init(&cfg, &ucsdata, NULL);
    logctx = log_init(NULL, &cfg);
    term_provide_logctx(term, logctx);
    term_size(term, cfg.height, cfg.width, cfg.savelines);

    /*
     * Initialise the fonts, simultaneously correcting the guesses
     * for font_{width,height}.
     */
    init_fonts(0, 0);

    /*
     * Correct the guesses for extra_{width,height}.
     */
    {
        RECT cr, wr;
        GetWindowRect(hwnd, &wr);
        GetClientRect(hwnd, &cr);
        offset_width = offset_height = cfg.window_border;
        extra_width = wr.right - wr.left - cr.right + cr.left
                      + offset_width * 2;
        extra_height = wr.bottom - wr.top - cr.bottom + cr.top
                       + offset_height * 2;
    }

    /*
     * Resize the window, now we know what size we _really_ want it
     * to be.
     */
    guess_width = extra_width + font_width * term->cols;
    guess_height = extra_height + font_height * term->rows;
    SetWindowPos(hwnd, NULL, 0, 0, guess_width, guess_height,
                 SWP_NOMOVE | SWP_NOREDRAW | SWP_NOZORDER);

    /*
     * Set up a caret bitmap, with no content.
     */
    {
        char *bits;
        int size = (font_width + 15) / 16 * 2 * font_height;
        bits = snewn(size, char);
        memset(bits, 0, size);
        caretbm = CreateBitmap(font_width, font_height, 1, 1, bits);
        sfree(bits);
    }
    CreateCaret(hwnd, caretbm, font_width, font_height);

    /*
     * Initialise the scroll bar.
     */
    {
        SCROLLINFO si;

        si.cbSize = sizeof(si);
        si.fMask = SIF_ALL | SIF_DISABLENOSCROLL;
        si.nMin = 0;
        si.nMax = term->rows - 1;
        si.nPage = term->rows;
        si.nPos = 0;
        SetScrollInfo(hwnd, SB_VERT, &si, FALSE);
    }

    /*
     * Prepare the mouse handler.
     */
    lastact = MA_NOTHING;
    lastbtn = MBT_NOTHING;
    dbltime = GetDoubleClickTime();


    start_backend();

    /*
     * Set up the initial input locale.
     */
    set_input_locale(GetKeyboardLayout(0));

    /*
     * Finally show the window!
     */
    ShowWindow(hwnd, show);
    SetForegroundWindow(hwnd);

    /*
     * Set the palette up.
     */
    pal = NULL;
    logpal = NULL;
    init_palette();

    term_set_focus(term, GetForegroundWindow() == hwnd);
    UpdateWindow(hwnd);

    while (1)
    {
        HANDLE *handles;
        int nhandles, n;

        handles = handle_get_events(&nhandles);

        n = MsgWaitForMultipleObjects(nhandles, handles, FALSE, INFINITE,
                                      QS_ALLINPUT);

        if ((unsigned) (n - WAIT_OBJECT_0) < (unsigned) nhandles)
        {
            handle_got_event(handles[n - WAIT_OBJECT_0]);
            sfree(handles);
            if (must_close_session)
                close_session();
        }
        else
            sfree(handles);

        while (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
        {
            if (msg.message == WM_QUIT)
                goto finished; /* two-level break */

            if (!(IsWindow(logbox) && IsDialogMessage(logbox, &msg)))
                DispatchMessage(&msg);
            /* Send the paste buffer if there's anything to send */
            term_paste(term);
            /* If there's nothing new in the queue then we can do everything
             * we've delayed, reading the socket, writing, and repainting
             * the window.
             */
            if (must_close_session)
                close_session();
        }

        /* The messages seem unreliable; especially if we're being tricky */
        term_set_focus(term, GetForegroundWindow() == hwnd);

        if (pending_netevent)
            enact_pending_netevent();

        net_pending_errors();
    }

finished:
    cleanup_exit(msg.wParam); /* this doesn't return... */
    return msg.wParam; /* ... but optimiser doesn't know */
}

/*
 * Clean up and exit.
 */
void cleanup_exit(int code)
{
    /*
     * Clean up.
     */
    deinit_fonts();
    sfree(logpal);
    if (pal)
        DeleteObject(pal);
    sk_cleanup();

    if (cfg.protocol == PROT_SSH)
    {
        random_save_seed();
#ifdef MSCRYPTOAPI
        crypto_wrapup();
#endif
    }
    //    shutdown_help();

    /* Clean up COM. */
    CoUninitialize();

    exit(code);
}

/*
 * Set up, or shut down, an AsyncSelect. Called from winnet.c.
 */
char *do_select(SOCKET skt, int startup)
{
    int msg, events;
    if (startup)
    {
        msg = WM_NETEVENT;
        events = (FD_CONNECT | FD_READ | FD_WRITE | FD_OOB | FD_CLOSE | FD_ACCEPT);
    }
    else
    {
        msg = events = 0;
    }
    if (!hwnd)
        return "do_select(): internal error (hwnd==NULL)";
    if (p_WSAAsyncSelect(skt, hwnd, msg, events) == SOCKET_ERROR)
    {
        switch (p_WSAGetLastError())
        {
        case WSAENETDOWN:
            return "Network is down";
        default:
            return "WSAAsyncSelect(): unknown error";
        }
    }
    return NULL;
}

/*
 * Refresh the saved-session submenu from `sesslist'.
 */
static void update_savedsess_menu(void)
{
    int i;
    while (DeleteMenu(savedsess_menu, 0, MF_BYPOSITION))
        ;
    /* skip sesslist.sessions[0] == Default Settings */
    for (i = 1;
            i
            < ((sesslist.nsessions <= MENU_SAVED_MAX + 1) ?
               sesslist.nsessions : MENU_SAVED_MAX + 1); i++)
        AppendMenu(savedsess_menu, MF_ENABLED,
                   IDM_SAVED_MIN + (i - 1) * MENU_SAVED_STEP, sesslist.sessions[i]);
    if (sesslist.nsessions <= 1)
        AppendMenu(savedsess_menu, MF_GRAYED, IDM_SAVED_MIN, "(No sessions)");
}

/*
 * Update the Special Commands submenu.
 */
void update_specials_menu(void *frontend)
{
    HMENU new_menu;
    int i, j;

    if (back)
        specials = back->get_specials(backhandle);
    else
        specials = NULL;

    if (specials)
    {
        /* We can't use Windows to provide a stack for submenus, so
         * here's a lame "stack" that will do for now. */
        HMENU saved_menu = NULL;
        int nesting = 1;
        new_menu = CreatePopupMenu();
        for (i = 0; nesting > 0; i++)
        {
            assert(IDM_SPECIAL_MIN + 0x10 * i < IDM_SPECIAL_MAX);
            switch (specials[i].code)
            {
            case TS_SEP:
                AppendMenu(new_menu, MF_SEPARATOR, 0, 0);
                break;
            case TS_SUBMENU:
                assert(nesting < 2);
                nesting++;
                saved_menu = new_menu; /* XXX lame stacking */
                new_menu = CreatePopupMenu();
                AppendMenu(saved_menu, MF_POPUP | MF_ENABLED, (UINT) new_menu,
                           specials[i].name);
                break;
            case TS_EXITMENU:
                nesting--;
                if (nesting)
                {
                    new_menu = saved_menu; /* XXX lame stacking */
                    saved_menu = NULL;
                }
                break;
            default:
                AppendMenu(new_menu, MF_ENABLED, IDM_SPECIAL_MIN + 0x10 * i,
                           specials[i].name);
                break;
            }
        }
        /* Squirrel the highest special. */
        n_specials = i - 1;
    }
    else
    {
        new_menu = NULL;
        n_specials = 0;
    }

    for (j = 0; j < lenof(popup_menus); j++)
    {
        if (specials_menu)
        {
            /* XXX does this free up all submenus? */
            DeleteMenu(popup_menus[j].menu, (UINT) specials_menu, MF_BYCOMMAND);
            DeleteMenu(popup_menus[j].menu, IDM_SPECIALSEP, MF_BYCOMMAND);
        }
        if (new_menu)
        {
            InsertMenu(popup_menus[j].menu, IDM_SHOWLOG,
                       MF_BYCOMMAND | MF_POPUP | MF_ENABLED, (UINT) new_menu,
                       "S&pecial Command");
            InsertMenu(popup_menus[j].menu, IDM_SHOWLOG, MF_BYCOMMAND | MF_SEPARATOR,
                       IDM_SPECIALSEP, 0);
        }
    }
    specials_menu = new_menu;
}

static void update_mouse_pointer(void)
{
    LPTSTR curstype;
    int force_visible = FALSE;
    static int forced_visible = FALSE;
    switch (busy_status)
    {
    case BUSY_NOT:
        if (send_raw_mouse)
            curstype = IDC_ARROW;
        else
            curstype = IDC_IBEAM;
        break;
    case BUSY_WAITING:
        curstype = IDC_APPSTARTING; /* this may be an abuse */
        force_visible = TRUE;
        break;
    case BUSY_CPU:
        curstype = IDC_WAIT;
        force_visible = TRUE;
        break;
    default:
        assert(0);
    }
    {
        HCURSOR cursor = LoadCursor(NULL, curstype);
        SetClassLongPtr(hwnd, GCLP_HCURSOR, (LONG_PTR) cursor);
        SetCursor(cursor); /* force redraw of cursor at current posn */
    }
    if (force_visible != forced_visible)
    {
        /* We want some cursor shapes to be visible always.
         * Along with show_mouseptr(), this manages the ShowCursor()
         * counter such that if we switch back to a non-force_visible
         * cursor, the previous visibility state is restored. */
        ShowCursor(force_visible);
        forced_visible = force_visible;
    }
}

void set_busy_status(void *frontend, int status)
{
    busy_status = status;
    update_mouse_pointer();
}

/*
 * set or clear the "raw mouse message" mode
 */
void set_raw_mouse_mode(void *frontend, int activate)
{
    activate = activate && !cfg.no_mouse_rep;
    send_raw_mouse = activate;
    update_mouse_pointer();
}

/*
 * Print a message box and close the connection.
 */
void connection_fatal(void *frontend, char *fmt, ...)
{
    va_list ap;
    char *stuff, morestuff[100];

    va_start(ap, fmt);
    stuff = dupvprintf(fmt, ap);
    va_end(ap);
    sprintf(morestuff, "%.70s Fatal Error", appname);
    MessageBox(hwnd, stuff, morestuff, MB_ICONERROR | MB_OK);
    sfree(stuff);

    if (cfg.close_on_exit == FORCE_ON)
        PostQuitMessage(1);
    else
    {
        must_close_session = TRUE;
    }
}

/*
 * Report an error at the command-line parsing stage.
 */
void cmdline_error(char *fmt, ...)
{
    va_list ap;
    char *stuff, morestuff[100];

    va_start(ap, fmt);
    stuff = dupvprintf(fmt, ap);
    va_end(ap);
    sprintf(morestuff, "%.70s Command Line Error", appname);
    MessageBox(hwnd, stuff, morestuff, MB_ICONERROR | MB_OK);
    sfree(stuff);
    exit(1);
}

/*
 * Actually do the job requested by a WM_NETEVENT
 */
static void enact_pending_netevent(void)
{
    static int reentering = 0;
    extern int select_result(WPARAM, LPARAM);

    if (reentering)
        return; /* don't unpend the pending */

    pending_netevent = FALSE;

    reentering = 1;
    select_result(pend_netevent_wParam, pend_netevent_lParam);
    reentering = 0;
}

/*
 * Copy the colour palette from the configuration data into defpal.
 * This is non-trivial because the colour indices are different.
 */
static void cfgtopalette(void)
{
    int i;
    static const int ww[] =
    {
        256, 257, 258, 259, 260, 261, 0, 8, 1, 9, 2, 10, 3, 11, 4, 12, 5, 13, 6, 14,
        7, 15
    };

    for (i = 0; i < 22; i++)
    {
        int w = ww[i];
        defpal[w].rgbtRed = cfg.colours[i][0];
        defpal[w].rgbtGreen = cfg.colours[i][1];
        defpal[w].rgbtBlue = cfg.colours[i][2];
    }
    for (i = 0; i < NEXTCOLOURS; i++)
    {
        if (i < 216)
        {
            int r = i / 36, g = (i / 6) % 6, b = i % 6;
            defpal[i + 16].rgbtRed = r ? r * 40 + 55 : 0;
            defpal[i + 16].rgbtGreen = g ? g * 40 + 55 : 0;
            defpal[i + 16].rgbtBlue = b ? b * 40 + 55 : 0;
        }
        else
        {
            int shade = i - 216;
            shade = shade * 10 + 8;
            defpal[i + 16].rgbtRed = defpal[i + 16].rgbtGreen =
                                         defpal[i + 16].rgbtBlue = shade;
        }
    }

    /* Override with system colours if appropriate */
    if (cfg.system_colour)
        systopalette();
}

/*
 * Override bit of defpal with colours from the system.
 * (NB that this takes a copy the system colours at the time this is called,
 * so subsequent colour scheme changes don't take effect. To fix that we'd
 * probably want to be using GetSysColorBrush() and the like.)
 */
static void systopalette(void)
{
    int i;
    static const struct
    {
        int nIndex;
        int norm;
        int bold;
    } or[] =
    {
        { COLOR_WINDOWTEXT, 256, 257 }, /* Default Foreground */
        { COLOR_WINDOW, 258, 259 }, /* Default Background */
        { COLOR_HIGHLIGHTTEXT, 260, 260 }, /* Cursor Text */
        { COLOR_HIGHLIGHT, 261, 261 }, /* Cursor Colour */
    };

    for (i = 0; i < (sizeof(or) / sizeof(or[0])); i++)
    {
        COLORREF colour = GetSysColor(or[i].nIndex);
        defpal[or[i].norm].rgbtRed = defpal[or[i].bold].rgbtRed = GetRValue(colour);
        defpal[or[i].norm].rgbtGreen = defpal[or[i].bold].rgbtGreen = GetGValue(colour);
        defpal[or[i].norm].rgbtBlue = defpal[or[i].bold].rgbtBlue = GetBValue(colour);
    }
}

/*
 * Set up the colour palette.
 */
static void init_palette(void)
{
    int i;
    HDC hdc = GetDC(hwnd);
    if (hdc)
    {
        if (cfg.try_palette && GetDeviceCaps(hdc, RASTERCAPS) & RC_PALETTE)
        {
            /*
             * This is a genuine case where we must use smalloc
             * because the snew macros can't cope.
             */
            logpal = smalloc(sizeof(*logpal)
                             - sizeof(logpal->palPalEntry)
                             + NALLCOLOURS * sizeof(PALETTEENTRY));
            logpal->palVersion = 0x300;
            logpal->palNumEntries = NALLCOLOURS;
            for (i = 0; i < NALLCOLOURS; i++)
            {
                logpal->palPalEntry[i].peRed = defpal[i].rgbtRed;
                logpal->palPalEntry[i].peGreen = defpal[i].rgbtGreen;
                logpal->palPalEntry[i].peBlue = defpal[i].rgbtBlue;
                logpal->palPalEntry[i].peFlags = PC_NOCOLLAPSE;
            }
            pal = CreatePalette(logpal);
            if (pal)
            {
                SelectPalette(hdc, pal, FALSE);
                RealizePalette(hdc);
                SelectPalette(hdc, GetStockObject(DEFAULT_PALETTE), FALSE);
            }
        }
        ReleaseDC(hwnd, hdc);
    }
    if (pal)
        for (i = 0; i < NALLCOLOURS; i++)
            colours[i] = PALETTERGB(defpal[i].rgbtRed, defpal[i].rgbtGreen,
                                    defpal[i].rgbtBlue);
    else
        for (i = 0; i < NALLCOLOURS; i++)
            colours[i] = RGB(defpal[i].rgbtRed, defpal[i].rgbtGreen,
                             defpal[i].rgbtBlue);
}

/*
 * This is a wrapper to ExtTextOut() to force Windows to display
 * the precise glyphs we give it. Otherwise it would do its own
 * bidi and Arabic shaping, and we would end up uncertain which
 * characters it had put where.
 */
static void exact_textout(HDC hdc, int x, int y, CONST RECT *lprc,
                          unsigned short *lpString, UINT cbCount, CONST INT *lpDx, int opaque)
{
#ifdef __LCC__
    /*
     * The LCC include files apparently don't supply the
     * GCP_RESULTSW type, but we can make do with GCP_RESULTS
     * proper: the differences aren't important to us (the only
     * variable-width string parameter is one we don't use anyway).
     */
    GCP_RESULTS gcpr;
#else
    GCP_RESULTSW gcpr;
#endif
    char *buffer = snewn(cbCount * 2 + 2, char);
    char *classbuffer = snewn(cbCount, char);
    memset(&gcpr, 0, sizeof(gcpr));
    memset(buffer, 0, cbCount * 2 + 2);
    memset(classbuffer, GCPCLASS_NEUTRAL, cbCount);

    gcpr.lStructSize = sizeof(gcpr);
    gcpr.lpGlyphs = (void *) buffer;
    gcpr.lpClass = (void *) classbuffer;
    gcpr.nGlyphs = cbCount;
    GetCharacterPlacementW(hdc, lpString, cbCount, 0, &gcpr,
                           FLI_MASK | GCP_CLASSIN | GCP_DIACRITIC);

    ExtTextOut(hdc, x, y,
               ETO_GLYPH_INDEX | ETO_CLIPPED | (opaque ? ETO_OPAQUE : 0), lprc,
               buffer, cbCount, lpDx);
}

/*
 * The exact_textout() wrapper, unfortunately, destroys the useful
 * Windows `font linking' behaviour: automatic handling of Unicode
 * code points not supported in this font by falling back to a font
 * which does contain them. Therefore, we adopt a multi-layered
 * approach: for any potentially-bidi text, we use exact_textout(),
 * and for everything else we use a simple ExtTextOut as we did
 * before exact_textout() was introduced.
 */
static void general_textout(HDC hdc, int x, int y, CONST RECT *lprc,
                            unsigned short *lpString, UINT cbCount, CONST INT *lpDx, int opaque)
{
    int i, j, xp, xn;
    int bkmode = 0, got_bkmode = FALSE;

    xp = xn = x;

    for (i = 0; i < (int) cbCount;)
    {
        int rtl = is_rtl(lpString[i]);

        xn += lpDx[i];

        for (j = i + 1; j < (int) cbCount; j++)
        {
            if (rtl != is_rtl(lpString[j]))
                break;
            xn += lpDx[j];
        }

        /*
         * Now [i,j) indicates a maximal substring of lpString
         * which should be displayed using the same textout
         * function.
         */
        if (rtl)
        {
            exact_textout(hdc, xp, y, lprc, lpString + i, j - i,
                          font_varpitch ? NULL : lpDx + i, opaque);
        }
        else
        {
            ExtTextOutW(hdc, xp, y, ETO_CLIPPED | (opaque ? ETO_OPAQUE : 0),
                        lprc, lpString + i, j - i, font_varpitch ? NULL : lpDx + i);
        }

        i = j;
        xp = xn;

        bkmode = GetBkMode(hdc);
        got_bkmode = TRUE;
        SetBkMode(hdc, TRANSPARENT);
        opaque = FALSE;
    }

    if (got_bkmode)
        SetBkMode(hdc, bkmode);
}

static int get_font_width(HDC hdc, const TEXTMETRIC *tm)
{
    int ret;
    /* Note that the TMPF_FIXED_PITCH bit is defined upside down :-( */
    if (!(tm->tmPitchAndFamily & TMPF_FIXED_PITCH))
    {
        ret = tm->tmAveCharWidth;
    }
    else
    {
#define FIRST '0'
#define LAST '9'
        ABCFLOAT widths[LAST - FIRST + 1];
        int j;

        font_varpitch = TRUE;
        font_dualwidth = TRUE;
        if (GetCharABCWidthsFloat(hdc, FIRST, LAST, widths))
        {
            ret = 0;
            for (j = 0; j < lenof(widths); j++)
            {
                int width =
                    (int) (0.5 + widths[j].abcfA + widths[j].abcfB + widths[j].abcfC);
                if (ret < width)
                    ret = width;
            }
        }
        else
        {
            ret = tm->tmMaxCharWidth;
        }
#undef FIRST
#undef LAST
    }
    return ret;
}

/*
 * Initialise all the fonts we will need initially. There may be as many as
 * three or as few as one.  The other (potentially) twenty-one fonts are done
 * if/when they are needed.
 *
 * We also:
 *
 * - check the font width and height, correcting our guesses if
 *   necessary.
 *
 * - verify that the bold font is the same width as the ordinary
 *   one, and engage shadow bolding if not.
 *
 * - verify that the underlined font is the same width as the
 *   ordinary one (manual underlining by means of line drawing can
 *   be done in a pinch).
 */
static void init_fonts(int pick_width, int pick_height)
{
    TEXTMETRIC tm;
    CPINFO cpinfo;
    int fontsize[3];
    int i;
    HDC hdc;
    int fw_dontcare, fw_bold;

    for (i = 0; i < FONT_MAXNO; i++)
        fonts[i] = NULL;

    bold_mode = cfg.bold_colour ? BOLD_COLOURS : BOLD_FONT;
    und_mode = UND_FONT;

    if (cfg.font.isbold)
    {
        fw_dontcare = FW_BOLD;
        fw_bold = FW_HEAVY;
    }
    else
    {
        fw_dontcare = FW_DONTCARE;
        fw_bold = FW_BOLD;
    }

    hdc = GetDC(hwnd);

    if (pick_height)
        font_height = pick_height;
    else
    {
        font_height = cfg.font.height;
        if (font_height > 0)
        {
            font_height = -MulDiv(font_height, GetDeviceCaps(hdc, LOGPIXELSY), 72);
        }
    }
    font_width = pick_width;

#define f(i,c,w,u) \
    fonts[i] = CreateFont (font_height, font_width, 0, 0, w, FALSE, u, FALSE, \
			   c, OUT_DEFAULT_PRECIS, \
		           CLIP_DEFAULT_PRECIS, FONT_QUALITY(cfg.font_quality), \
			   FIXED_PITCH | FF_DONTCARE, cfg.font.name)

    f(FONT_NORMAL, cfg.font.charset, fw_dontcare, FALSE);

    SelectObject(hdc, fonts[FONT_NORMAL]);
    GetTextMetrics(hdc, &tm);

    GetObject(fonts[FONT_NORMAL], sizeof(LOGFONT), &lfont);

    /* Note that the TMPF_FIXED_PITCH bit is defined upside down :-( */
    if (!(tm.tmPitchAndFamily & TMPF_FIXED_PITCH))
    {
        font_varpitch = FALSE;
        font_dualwidth = (tm.tmAveCharWidth != tm.tmMaxCharWidth);
    }
    else
    {
        font_varpitch = TRUE;
        font_dualwidth = TRUE;
    }
    if (pick_width == 0 || pick_height == 0)
    {
        font_height = tm.tmHeight;
        font_width = get_font_width(hdc, &tm);
    }

#ifdef RDB_DEBUG_PATCH
    debug(23, "Primary font H=%d, AW=%d, MW=%d",
          tm.tmHeight, tm.tmAveCharWidth, tm.tmMaxCharWidth);
#endif

    {
        CHARSETINFO info;
        DWORD cset = tm.tmCharSet;
        memset(&info, 0xFF, sizeof(info));

        /* !!! Yes the next line is right */
        if (cset == OEM_CHARSET)
            ucsdata.font_codepage = GetOEMCP();
        else if (TranslateCharsetInfo((DWORD *) cset, &info, TCI_SRCCHARSET))
            ucsdata.font_codepage = info.ciACP;
        else
            ucsdata.font_codepage = -1;

        GetCPInfo(ucsdata.font_codepage, &cpinfo);
        ucsdata.dbcs_screenfont = (cpinfo.MaxCharSize > 1);
    }

    f(FONT_UNDERLINE, cfg.font.charset, fw_dontcare, TRUE);

    /*
     * Some fonts, e.g. 9-pt Courier, draw their underlines
     * outside their character cell. We successfully prevent
     * screen corruption by clipping the text output, but then
     * we lose the underline completely. Here we try to work
     * out whether this is such a font, and if it is, we set a
     * flag that causes underlines to be drawn by hand.
     *
     * Having tried other more sophisticated approaches (such
     * as examining the TEXTMETRIC structure or requesting the
     * height of a string), I think we'll do this the brute
     * force way: we create a small bitmap, draw an underlined
     * space on it, and test to see whether any pixels are
     * foreground-coloured. (Since we expect the underline to
     * go all the way across the character cell, we only search
     * down a single column of the bitmap, half way across.)
     */
    {
        HDC und_dc;
        HBITMAP und_bm, und_oldbm;
        int i, gotit;
        COLORREF c;

        und_dc = CreateCompatibleDC(hdc);
        und_bm = CreateCompatibleBitmap(hdc, font_width, font_height);
        und_oldbm = SelectObject(und_dc, und_bm);
        SelectObject(und_dc, fonts[FONT_UNDERLINE]);
        SetTextAlign(und_dc, TA_TOP | TA_LEFT | TA_NOUPDATECP);
        SetTextColor(und_dc, RGB(255, 255, 255));
        SetBkColor(und_dc, RGB(0, 0, 0));
        SetBkMode(und_dc, OPAQUE);
        ExtTextOut(und_dc, 0, 0, ETO_OPAQUE, NULL, " ", 1, NULL);
        gotit = FALSE;
        for (i = 0; i < font_height; i++)
        {
            c = GetPixel(und_dc, font_width / 2, i);
            if (c != RGB(0, 0, 0))
                gotit = TRUE;
        }
        SelectObject(und_dc, und_oldbm);
        DeleteObject(und_bm);
        DeleteDC(und_dc);
        if (!gotit)
        {
            und_mode = UND_LINE;
            DeleteObject(fonts[FONT_UNDERLINE]);
            fonts[FONT_UNDERLINE] = 0;
        }
    }

    if (bold_mode == BOLD_FONT)
    {
        f(FONT_BOLD, cfg.font.charset, fw_bold, FALSE);
    }
#undef f

    descent = tm.tmAscent + 1;
    if (descent >= font_height)
        descent = font_height - 1;

    for (i = 0; i < 3; i++)
    {
        if (fonts[i])
        {
            if (SelectObject(hdc, fonts[i]) && GetTextMetrics(hdc, &tm))
                fontsize[i] = get_font_width(hdc, &tm) + 256 * tm.tmHeight;
            else
                fontsize[i] = -i;
        }
        else
            fontsize[i] = -i;
    }

    ReleaseDC(hwnd, hdc);

    if (fontsize[FONT_UNDERLINE] != fontsize[FONT_NORMAL])
    {
        und_mode = UND_LINE;
        DeleteObject(fonts[FONT_UNDERLINE]);
        fonts[FONT_UNDERLINE] = 0;
    }

    if (bold_mode == BOLD_FONT && fontsize[FONT_BOLD] != fontsize[FONT_NORMAL])
    {
        bold_mode = BOLD_SHADOW;
        DeleteObject(fonts[FONT_BOLD]);
        fonts[FONT_BOLD] = 0;
    }
    fontflag[0] = fontflag[1] = fontflag[2] = 1;

    init_ucs(&cfg, &ucsdata);
}

static void another_font(int fontno)
{
    int basefont;
    int fw_dontcare, fw_bold;
    int c, u, w, x;
    char *s;

    if (fontno < 0 || fontno >= FONT_MAXNO || fontflag[fontno])
        return;

    basefont = (fontno & ~(FONT_BOLDUND));
    if (basefont != fontno && !fontflag[basefont])
        another_font(basefont);

    if (cfg.font.isbold)
    {
        fw_dontcare = FW_BOLD;
        fw_bold = FW_HEAVY;
    }
    else
    {
        fw_dontcare = FW_DONTCARE;
        fw_bold = FW_BOLD;
    }

    c = cfg.font.charset;
    w = fw_dontcare;
    u = FALSE;
    s = cfg.font.name;
    x = font_width;

    if (fontno & FONT_WIDE)
        x *= 2;
    if (fontno & FONT_NARROW)
        x = (x + 1) / 2;
    if (fontno & FONT_OEM)
        c = OEM_CHARSET;
    if (fontno & FONT_BOLD)
        w = fw_bold;
    if (fontno & FONT_UNDERLINE)
        u = TRUE;

    fonts[fontno] = CreateFont(font_height * (1 + !!(fontno & FONT_HIGH)), x, 0, 0,
                               w, FALSE, u, FALSE, c, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
                               FONT_QUALITY(cfg.font_quality), DEFAULT_PITCH | FF_DONTCARE, s);

    fontflag[fontno] = 1;
}

static void deinit_fonts(void)
{
    int i;
    for (i = 0; i < FONT_MAXNO; i++)
    {
        if (fonts[i])
            DeleteObject(fonts[i]);
        fonts[i] = 0;
        fontflag[i] = 0;
    }
}

void request_resize(void *frontend, int w, int h)
{
    int width, height;

    /* If the window is maximized supress resizing attempts */
    if (IsZoomed(hwnd))
    {
        if (cfg.resize_action == RESIZE_TERM)
            return;
    }

    if (cfg.resize_action == RESIZE_DISABLED)
        return;
    if (h == term->rows && w == term->cols)
        return;

    /* Sanity checks ... */
    {
        static int first_time = 1;
        static RECT ss;

        switch (first_time)
        {
        case 1:
            /* Get the size of the screen */
            if (get_fullscreen_rect(&ss))
                /* first_time = 0 */;
            else
            {
                first_time = 2;
                break;
            }
        case 0:
            /* Make sure the values are sane */
            width = (ss.right - ss.left - extra_width) / 4;
            height = (ss.bottom - ss.top - extra_height) / 6;

            if (w > width || h > height)
                return;
            if (w < 15)
                w = 15;
            if (h < 1)
                h = 1;
        }
    }

    term_size(term, h, w, cfg.savelines);

    if (cfg.resize_action != RESIZE_FONT && !IsZoomed(hwnd))
    {
        width = extra_width + font_width * w;
        height = extra_height + font_height * h;

        SetWindowPos(hwnd, NULL, 0, 0, width, height,
                     SWP_NOACTIVATE | SWP_NOCOPYBITS | SWP_NOMOVE | SWP_NOZORDER);
    }
    else
        reset_window(0);

    InvalidateRect(hwnd, NULL, TRUE);
}

static void reset_window(int reinit)
{
    /*
     * This function decides how to resize or redraw when the
     * user changes something.
     *
     * This function doesn't like to change the terminal size but if the
     * font size is locked that may be it's only soluion.
     */
    int win_width, win_height;
    RECT cr, wr;

#ifdef RDB_DEBUG_PATCH
    debug((27, "reset_window()"));
#endif

    /* Current window sizes ... */
    GetWindowRect(hwnd, &wr);
    GetClientRect(hwnd, &cr);

    win_width = cr.right - cr.left;
    win_height = cr.bottom - cr.top;

    if (cfg.resize_action == RESIZE_DISABLED)
        reinit = 2;

    /* Are we being forced to reload the fonts ? */
    if (reinit > 1)
    {
#ifdef RDB_DEBUG_PATCH
        debug((27, "reset_window() -- Forced deinit"));
#endif
        deinit_fonts();
        init_fonts(0, 0);
    }

    /* Oh, looks like we're minimised */
    if (win_width == 0 || win_height == 0)
        return;

    /* Is the window out of position ? */
    if (!reinit
            && (offset_width != (win_width - font_width * term->cols) / 2
                || offset_height != (win_height - font_height * term->rows) / 2))
    {
        offset_width = (win_width - font_width * term->cols) / 2;
        offset_height = (win_height - font_height * term->rows) / 2;
        InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
        debug((27, "reset_window() -> Reposition terminal"));
#endif
    }

    if (IsZoomed(hwnd))
    {
        /* We're fullscreen, this means we must not change the size of
         * the window so it's the font size or the terminal itself.
         */

        extra_width = wr.right - wr.left - cr.right + cr.left;
        extra_height = wr.bottom - wr.top - cr.bottom + cr.top;

        if (cfg.resize_action != RESIZE_TERM)
        {
            if (font_width != win_width / term->cols
                    || font_height != win_height / term->rows)
            {
                deinit_fonts();
                init_fonts(win_width / term->cols, win_height / term->rows);
                offset_width = (win_width - font_width * term->cols) / 2;
                offset_height = (win_height - font_height * term->rows) / 2;
                InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
                debug((25, "reset_window() -> Z font resize to (%d, %d)",
                       font_width, font_height));
#endif
            }
        }
        else
        {
            if (font_width *term->cols != win_width
                    || font_height *term->rows != win_height)
            {
                /* Our only choice at this point is to change the
                 * size of the terminal; Oh well.
                 */
                term_size(term, win_height / font_height, win_width / font_width,
                          cfg.savelines);
                offset_width = (win_width - font_width * term->cols) / 2;
                offset_height = (win_height - font_height * term->rows) / 2;
                InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
                debug((27, "reset_window() -> Zoomed term_size"));
#endif
            }
        }
        return;
    }

    /* Hmm, a force re-init means we should ignore the current window
     * so we resize to the default font size.
     */
    if (reinit > 0)
    {
#ifdef RDB_DEBUG_PATCH
        debug((27, "reset_window() -> Forced re-init"));
#endif

        offset_width = offset_height = cfg.window_border;
        extra_width = wr.right - wr.left - cr.right + cr.left + offset_width * 2;
        extra_height = wr.bottom - wr.top - cr.bottom + cr.top + offset_height * 2;

        if (win_width != font_width * term->cols + offset_width * 2
                || win_height != font_height * term->rows + offset_height * 2)
        {

            /* If this is too large windows will resize it to the maximum
             * allowed window size, we will then be back in here and resize
             * the font or terminal to fit.
             */
            SetWindowPos(hwnd, NULL, 0, 0, font_width * term->cols + extra_width,
                         font_height * term->rows + extra_height, SWP_NOMOVE | SWP_NOZORDER);
        }

        InvalidateRect(hwnd, NULL, TRUE);
        return;
    }

    /* Okay the user doesn't want us to change the font so we try the
     * window. But that may be too big for the screen which forces us
     * to change the terminal.
     */
    if ((cfg.resize_action == RESIZE_TERM && reinit <= 0)
            || (cfg.resize_action == RESIZE_EITHER && reinit < 0) || reinit > 0)
    {
        offset_width = offset_height = cfg.window_border;
        extra_width = wr.right - wr.left - cr.right + cr.left + offset_width * 2;
        extra_height = wr.bottom - wr.top - cr.bottom + cr.top + offset_height * 2;

        if (win_width != font_width * term->cols + offset_width * 2
                || win_height != font_height * term->rows + offset_height * 2)
        {

            static RECT ss;
            int width, height;

            get_fullscreen_rect(&ss);

            width = (ss.right - ss.left - extra_width) / font_width;
            height = (ss.bottom - ss.top - extra_height) / font_height;

            /* Grrr too big */
            if (term->rows > height || term->cols > width)
            {
                if (cfg.resize_action == RESIZE_EITHER)
                {
                    /* Make the font the biggest we can */
                    if (term->cols > width)
                        font_width = (ss.right - ss.left - extra_width) / term->cols;
                    if (term->rows > height)
                        font_height = (ss.bottom - ss.top - extra_height) / term->rows;

                    deinit_fonts();
                    init_fonts(font_width, font_height);

                    width = (ss.right - ss.left - extra_width) / font_width;
                    height = (ss.bottom - ss.top - extra_height) / font_height;
                }
                else
                {
                    if (height > term->rows)
                        height = term->rows;
                    if (width > term->cols)
                        width = term->cols;
                    term_size(term, height, width, cfg.savelines);
#ifdef RDB_DEBUG_PATCH
                    debug((27, "reset_window() -> term resize to (%d,%d)",
                           height, width));
#endif
                }
            }

            SetWindowPos(hwnd, NULL, 0, 0, font_width * term->cols + extra_width,
                         font_height * term->rows + extra_height, SWP_NOMOVE | SWP_NOZORDER);

            InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
            debug((27, "reset_window() -> window resize to (%d,%d)",
                   font_width * term->cols + extra_width,
                   font_height * term->rows + extra_height));
#endif
        }
        return;
    }

    /* We're allowed to or must change the font but do we want to ?  */

    if (font_width != (win_width - cfg.window_border * 2) / term->cols
            || font_height != (win_height - cfg.window_border * 2) / term->rows)
    {

        deinit_fonts();
        init_fonts((win_width - cfg.window_border * 2) / term->cols,
                   (win_height - cfg.window_border * 2) / term->rows);
        offset_width = (win_width - font_width * term->cols) / 2;
        offset_height = (win_height - font_height * term->rows) / 2;

        extra_width = wr.right - wr.left - cr.right + cr.left + offset_width * 2;
        extra_height = wr.bottom - wr.top - cr.bottom + cr.top + offset_height * 2;

        InvalidateRect(hwnd, NULL, TRUE);
#ifdef RDB_DEBUG_PATCH
        debug((25, "reset_window() -> font resize to (%d,%d)",
               font_width, font_height));
#endif
    }
}

static void set_input_locale(HKL kl)
{
    char lbuf[20];

    GetLocaleInfo(LOWORD(kl), LOCALE_IDEFAULTANSICODEPAGE, lbuf, sizeof(lbuf));

    kbd_codepage = atoi(lbuf);
}

static void click(Mouse_Button b, int x, int y, int shift, int ctrl, int alt)
{
    int thistime = GetMessageTime();

    if (send_raw_mouse && !(cfg.mouse_override && shift))
    {
        lastbtn = MBT_NOTHING;
        term_mouse(term, b, translate_button(b), MA_CLICK, x, y, shift, ctrl, alt);
        return;
    }

    if (lastbtn == b && thistime - lasttime < dbltime)
    {
        lastact = (lastact == MA_CLICK ? MA_2CLK : lastact == MA_2CLK ? MA_3CLK :
                   lastact == MA_3CLK ? MA_CLICK : MA_NOTHING);
    }
    else
    {
        lastbtn = b;
        lastact = MA_CLICK;
    }
    if (lastact != MA_NOTHING)
        term_mouse(term, b, translate_button(b), lastact, x, y, shift, ctrl, alt);
    lasttime = thistime;
}

/*
 * Translate a raw mouse button designation (LEFT, MIDDLE, RIGHT)
 * into a cooked one (SELECT, EXTEND, PASTE).
 */
static Mouse_Button translate_button(Mouse_Button button)
{
    if (button == MBT_LEFT)
        return MBT_SELECT;
    if (button == MBT_MIDDLE)
        return cfg.mouse_is_xterm == 1 ? MBT_PASTE : MBT_EXTEND;
    if (button == MBT_RIGHT)
        return cfg.mouse_is_xterm == 1 ? MBT_EXTEND : MBT_PASTE;
    return 0; /* shouldn't happen */
}

static void show_mouseptr(int show)
{
    /* NB that the counter in ShowCursor() is also frobbed by
     * update_mouse_pointer() */
    static int cursor_visible = 1;
    if (!cfg.hide_mouseptr) /* override if this feature disabled */
        show = 1;
    if (cursor_visible && !show)
        ShowCursor(FALSE);
    else if (!cursor_visible && show)
        ShowCursor(TRUE);
    cursor_visible = show;
}

static int is_alt_pressed(void)
{
    BYTE keystate[256];
    int r = GetKeyboardState(keystate);
    if (!r)
        return FALSE;
    if (keystate[VK_MENU] & 0x80)
        return TRUE;
    if (keystate[VK_RMENU] & 0x80)
        return TRUE;
    return FALSE;
}

static int resizing;

void notify_remote_exit(void *fe)
{
    int exitcode;

    if (!session_closed && (exitcode = back->exitcode(backhandle)) >= 0)
    {
        /* Abnormal exits will already have set session_closed and taken
         * appropriate action. */
        if (cfg.close_on_exit == FORCE_ON
                || (cfg.close_on_exit == AUTO && exitcode != INT_MAX))
        {
            PostQuitMessage(0);
        }
        else
        {
            must_close_session = TRUE;
            session_closed = TRUE;
            /* exitcode == INT_MAX indicates that the connection was closed
             * by a fatal error, so an error box will be coming our way and
             * we should not generate this informational one. */
            if (exitcode != INT_MAX)
                MessageBox(hwnd, "Connection closed by remote host", appname,
                           MB_OK | MB_ICONINFORMATION);
        }
    }
}

void timer_change_notify(long next)
{
    long ticks = next - GETTICKCOUNT();
    if (ticks <= 0)
        ticks = 1; /* just in case */
    KillTimer(hwnd, TIMING_TIMER_ID);
    SetTimer(hwnd, TIMING_TIMER_ID, ticks, NULL);
    timing_next_time = next;
}

static LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam,
                                LPARAM lParam)
{
    HDC hdc;
    static int ignore_clip = FALSE;
    static int need_backend_resize = FALSE;
    static int fullscr_on_max = FALSE;
    static int processed_resize = FALSE;
    static UINT last_mousemove = 0;

    switch (message)
    {
    case WM_TIMER:
        if ((UINT_PTR) wParam == TIMING_TIMER_ID)
        {
            long next;

            KillTimer(hwnd, TIMING_TIMER_ID);
            if (run_timers(timing_next_time, &next))
            {
                timer_change_notify(next);
            }
            else
            {
            }
        }
        return 0;
    case WM_CREATE:
        break;
    case WM_CLOSE:
    {
        char *str;
        show_mouseptr(1);
        str = dupprintf("%s Exit Confirmation", appname);
        if (!cfg.warn_on_close || session_closed ||
                MessageBox(hwnd,
                           "Are you sure you want to close this session?",
                           str, MB_ICONWARNING | MB_OKCANCEL | MB_DEFBUTTON1)
                == IDOK)
            DestroyWindow(hwnd);
        sfree(str);
    }
    return 0;
    case WM_DESTROY:
        show_mouseptr(1);
        PostQuitMessage(0);
        return 0;
    case WM_INITMENUPOPUP:
        if ((HMENU) wParam == savedsess_menu)
        {
            /* About to pop up Saved Sessions sub-menu.
             * Refresh the session list. */
            get_sesslist(&sesslist, FALSE); /* free */
            get_sesslist(&sesslist, TRUE);
            update_savedsess_menu();
            return 0;
        }
        break;
    case WM_COMMAND:
    case WM_SYSCOMMAND:
        switch (wParam & ~0xF)
        {
            /* low 4 bits reserved to Windows */
        case IDM_SHOWLOG:
            //            showeventlog(hwnd);
            break;
        case IDM_NEWSESS:
        case IDM_DUPSESS:
        case IDM_SAVEDSESS:
        {
            char b[2048];
            char c[30], *cl;
            int freecl = FALSE;
            BOOL inherit_handles;
            STARTUPINFO si;
            PROCESS_INFORMATION pi;
            HANDLE filemap = NULL;

            if (wParam == IDM_DUPSESS)
            {
                /*
                 * Allocate a file-mapping memory chunk for the
                 * config structure.
                 */
                SECURITY_ATTRIBUTES sa;
                Config *p;

                sa.nLength = sizeof(sa);
                sa.lpSecurityDescriptor = NULL;
                sa.bInheritHandle = TRUE;
                filemap = CreateFileMapping(INVALID_HANDLE_VALUE, &sa,
                                            PAGE_READWRITE, 0, sizeof(Config), NULL);
                if (filemap && filemap != INVALID_HANDLE_VALUE)
                {
                    p = (Config *) MapViewOfFile(filemap, FILE_MAP_WRITE, 0, 0,
                                                 sizeof(Config));
                    if (p)
                    {
                        *p = cfg; /* structure copy */
                        UnmapViewOfFile(p);
                    }
                }
                inherit_handles = TRUE;
                sprintf(c, "putty &%p", filemap);
                cl = c;
            }
            else if (wParam == IDM_SAVEDSESS)
            {
                unsigned int sessno = ((lParam - IDM_SAVED_MIN)
                                       / MENU_SAVED_STEP) + 1;
                if (sessno < (unsigned) sesslist.nsessions)
                {
                    char *session = sesslist.sessions[sessno];
                    cl = dupprintf("putty @%s", session);
                    inherit_handles = FALSE;
                    freecl = TRUE;
                }
                else
                    break;
            }
            else /* IDM_NEWSESS */
            {
                cl = NULL;
                inherit_handles = FALSE;
            }

            GetModuleFileName(NULL, b, sizeof(b) - 1);
            si.cb = sizeof(si);
            si.lpReserved = NULL;
            si.lpDesktop = NULL;
            si.lpTitle = NULL;
            si.dwFlags = 0;
            si.cbReserved2 = 0;
            si.lpReserved2 = NULL;
            CreateProcess(b, cl, NULL, NULL, inherit_handles,
                          NORMAL_PRIORITY_CLASS, NULL, NULL, &si, &pi);

            if (filemap)
                CloseHandle(filemap);
            if (freecl)
                sfree(cl);
        }
        break;
        case IDM_RESTART:
            if (!back)
            {
                logevent(NULL, "----- Session restarted -----");
                term_pwron(term, FALSE);
                start_backend();
            }

            break;
        case IDM_RECONF:
        {}
        break;
        case IDM_COPYALL:
            term_copyall(term);
            break;
        case IDM_PASTE:
            request_paste(NULL);
            break;
        case IDM_CLRSB:
            term_clrsb(term);
            break;
        case IDM_RESET:
            term_pwron(term, TRUE);
            if (ldisc)
                ldisc_send(ldisc, NULL, 0, 0);
            break;
        case IDM_ABOUT:
            //            showabout(hwnd);
            break;
        case IDM_HELP:
            //            launch_help(hwnd, NULL);
            break;
        case SC_MOUSEMENU:
            /*
             * We get this if the System menu has been activated
             * using the mouse.
             */
            show_mouseptr(1);
            break;
        case SC_KEYMENU:
            /*
             * We get this if the System menu has been activated
             * using the keyboard. This might happen from within
             * TranslateKey, in which case it really wants to be
             * followed by a `space' character to actually _bring
             * the menu up_ rather than just sitting there in
             * `ready to appear' state.
             */
            show_mouseptr(1); /* make sure pointer is visible */
            if (lParam == 0)
                PostMessage(hwnd, WM_CHAR, ' ', 0);
            break;
        case IDM_FULLSCREEN:
            flip_full_screen();
            break;
        default:
            if (wParam >= IDM_SAVED_MIN && wParam < IDM_SAVED_MAX)
            {
                SendMessage(hwnd, WM_SYSCOMMAND, IDM_SAVEDSESS, wParam);
            }
            if (wParam >= IDM_SPECIAL_MIN && wParam <= IDM_SPECIAL_MAX)
            {
                int i = (wParam - IDM_SPECIAL_MIN) / 0x10;
                /*
                 * Ensure we haven't been sent a bogus SYSCOMMAND
                 * which would cause us to reference invalid memory
                 * and crash. Perhaps I'm just too paranoid here.
                 */
                if (i >= n_specials)
                    break;
                if (back)
                    back->special(backhandle, specials[i].code);
                net_pending_errors();
            }
        }
        break;

#define X_POS(l) ((int)(short)LOWORD(l))
#define Y_POS(l) ((int)(short)HIWORD(l))

#define TO_CHR_X(x) ((((x)<0 ? (x)-font_width+1 : (x))-offset_width) / font_width)
#define TO_CHR_Y(y) ((((y)<0 ? (y)-font_height+1: (y))-offset_height) / font_height)
    case WM_LBUTTONDOWN:
    case WM_MBUTTONDOWN:
    case WM_RBUTTONDOWN:
    case WM_LBUTTONUP:
    case WM_MBUTTONUP:
    case WM_RBUTTONUP:
        if (message == WM_RBUTTONDOWN
                && ((wParam & MK_CONTROL) || (cfg.mouse_is_xterm == 2)))
        {
            POINT cursorpos;

            show_mouseptr(1); /* make sure pointer is visible */
            GetCursorPos(&cursorpos);
            TrackPopupMenu(popup_menus[CTXMENU].menu,
                           TPM_LEFTALIGN | TPM_TOPALIGN | TPM_RIGHTBUTTON, cursorpos.x,
                           cursorpos.y, 0, hwnd, NULL);
            break;
        }
        {
            int button, press;

            switch (message)
            {
            case WM_LBUTTONDOWN:
                button = MBT_LEFT;
                wParam |= MK_LBUTTON;
                press = 1;
                break;
            case WM_MBUTTONDOWN:
                button = MBT_MIDDLE;
                wParam |= MK_MBUTTON;
                press = 1;
                break;
            case WM_RBUTTONDOWN:
                button = MBT_RIGHT;
                wParam |= MK_RBUTTON;
                press = 1;
                break;
            case WM_LBUTTONUP:
                button = MBT_LEFT;
                wParam &= ~MK_LBUTTON;
                press = 0;
                break;
            case WM_MBUTTONUP:
                button = MBT_MIDDLE;
                wParam &= ~MK_MBUTTON;
                press = 0;
                break;
            case WM_RBUTTONUP:
                button = MBT_RIGHT;
                wParam &= ~MK_RBUTTON;
                press = 0;
                break;
            default:
                button = press = 0; /* shouldn't happen */
            }
            show_mouseptr(1);
            /*
             * Special case: in full-screen mode, if the left
             * button is clicked in the very top left corner of the
             * window, we put up the System menu instead of doing
             * selection.
             */
            {
                char mouse_on_hotspot = 0;
                POINT pt;

                GetCursorPos(&pt);
#ifndef NO_MULTIMON
                {
                    HMONITOR mon;
                    MONITORINFO mi;

                    mon = MonitorFromPoint(pt, MONITOR_DEFAULTTONULL);

                    if (mon != NULL)
                    {
                        mi.cbSize = sizeof(MONITORINFO);
                        GetMonitorInfo(mon, &mi);

                        if (mi.rcMonitor.left == pt.x &&
                                mi.rcMonitor.top == pt.y)
                        {
                            mouse_on_hotspot = 1;
                        }
                    }
                }
#else
                if (pt.x == 0 && pt.y == 0)
                {
                    mouse_on_hotspot = 1;
                }
#endif
                if (is_full_screen() && press && button == MBT_LEFT
                        && mouse_on_hotspot)
                {
                    SendMessage(hwnd, WM_SYSCOMMAND, SC_MOUSEMENU,
                                MAKELPARAM(pt.x, pt.y));
                    return 0;
                }
            }

            if (press)
            {
                click(button, TO_CHR_X(X_POS(lParam)), TO_CHR_Y(Y_POS(lParam)),
                      wParam & MK_SHIFT, wParam & MK_CONTROL,
                      is_alt_pressed());
                SetCapture(hwnd);
            }
            else
            {
                term_mouse(term, button, translate_button(button), MA_RELEASE,
                           TO_CHR_X(X_POS(lParam)), TO_CHR_Y(
                               Y_POS(lParam)),
                           wParam & MK_SHIFT, wParam & MK_CONTROL,
                           is_alt_pressed());
                if (!(wParam & (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON)))
                    ReleaseCapture();
            }
        }
        return 0;
    case WM_MOUSEMOVE:
    {
        /*
         * Windows seems to like to occasionally send MOUSEMOVE
         * events even if the mouse hasn't moved. Don't unhide
         * the mouse pointer in this case.
         */
        static WPARAM wp = 0;
        static LPARAM lp = 0;
        if (wParam != wp || lParam != lp || last_mousemove != WM_MOUSEMOVE)
        {
            show_mouseptr(1);
            wp = wParam;
            lp = lParam;
            last_mousemove = WM_MOUSEMOVE;
        }
    }
    /*
     * Add the mouse position and message time to the random
     * number noise.
     */
    noise_ultralight(lParam);

    if (wParam & (MK_LBUTTON | MK_MBUTTON | MK_RBUTTON)
            && GetCapture() == hwnd)
    {
        Mouse_Button b;
        if (wParam & MK_LBUTTON)
            b = MBT_LEFT;
        else if (wParam & MK_MBUTTON)
            b = MBT_MIDDLE;
        else
            b = MBT_RIGHT;
        term_mouse(term, b, translate_button(b), MA_DRAG,
                   TO_CHR_X(X_POS(lParam)), TO_CHR_Y(Y_POS(lParam)),
                   wParam & MK_SHIFT, wParam & MK_CONTROL, is_alt_pressed());
    }
    return 0;
    case WM_NCMOUSEMOVE:
    {
        static WPARAM wp = 0;
        static LPARAM lp = 0;
        if (wParam != wp || lParam != lp || last_mousemove != WM_NCMOUSEMOVE)
        {
            show_mouseptr(1);
            wp = wParam;
            lp = lParam;
            last_mousemove = WM_NCMOUSEMOVE;
        }
    }
    noise_ultralight(lParam);
    break;
    case WM_IGNORE_CLIP:
        ignore_clip = wParam; /* don't panic on DESTROYCLIPBOARD */
        break;
    case WM_DESTROYCLIPBOARD:
        if (!ignore_clip)
            term_deselect(term);
        ignore_clip = FALSE;
        return 0;
    case WM_PAINT:
    {
        PAINTSTRUCT p;

        HideCaret(hwnd);
        hdc = BeginPaint(hwnd, &p);
        if (pal)
        {
            SelectPalette(hdc, pal, TRUE);
            RealizePalette(hdc);
        }

        /*
         * We have to be careful about term_paint(). It will
         * set a bunch of character cells to INVALID and then
         * call do_paint(), which will redraw those cells and
         * _then mark them as done_. This may not be accurate:
         * when painting in WM_PAINT context we are restricted
         * to the rectangle which has just been exposed - so if
         * that only covers _part_ of a character cell and the
         * rest of it was already visible, that remainder will
         * not be redrawn at all. Accordingly, we must not
         * paint any character cell in a WM_PAINT context which
         * already has a pending update due to terminal output.
         * The simplest solution to this - and many, many
         * thanks to Hung-Te Lin for working all this out - is
         * not to do any actual painting at _all_ if there's a
         * pending terminal update: just mark the relevant
         * character cells as INVALID and wait for the
         * scheduled full update to sort it out.
         *
         * I have a suspicion this isn't the _right_ solution.
         * An alternative approach would be to have terminal.c
         * separately track what _should_ be on the terminal
         * screen and what _is_ on the terminal screen, and
         * have two completely different types of redraw (one
         * for full updates, which syncs the former with the
         * terminal itself, and one for WM_PAINT which syncs
         * the latter with the former); yet another possibility
         * would be to have the Windows front end do what the
         * GTK one already does, and maintain a bitmap of the
         * current terminal appearance so that WM_PAINT becomes
         * completely trivial. However, this should do for now.
         */
        term_paint(term, hdc, (p.rcPaint.left - offset_width) / font_width,
                   (p.rcPaint.top - offset_height) / font_height,
                   (p.rcPaint.right - offset_width - 1) / font_width,
                   (p.rcPaint.bottom - offset_height - 1) / font_height,
                   !term->window_update_pending);

        if (p.fErase || p.rcPaint.left < offset_width
                || p.rcPaint.top < offset_height
                || p.rcPaint.right >= offset_width + font_width * term->cols
                || p.rcPaint.bottom >= offset_height + font_height * term->rows)
        {
            HBRUSH fillcolour, oldbrush;
            HPEN edge, oldpen;
            fillcolour = CreateSolidBrush(colours[ATTR_DEFBG >> ATTR_BGSHIFT]);
            oldbrush = SelectObject(hdc, fillcolour);
            edge = CreatePen(PS_SOLID, 0, colours[ATTR_DEFBG >> ATTR_BGSHIFT]);
            oldpen = SelectObject(hdc, edge);

            /*
             * Jordan Russell reports that this apparently
             * ineffectual IntersectClipRect() call masks a
             * Windows NT/2K bug causing strange display
             * problems when the PuTTY window is taller than
             * the primary monitor. It seems harmless enough...
             */
            IntersectClipRect(hdc, p.rcPaint.left, p.rcPaint.top,
                              p.rcPaint.right, p.rcPaint.bottom);

            ExcludeClipRect(hdc, offset_width, offset_height,
                            offset_width + font_width * term->cols,
                            offset_height + font_height * term->rows);

            Rectangle(hdc, p.rcPaint.left, p.rcPaint.top, p.rcPaint.right,
                      p.rcPaint.bottom);

            /* SelectClipRgn(hdc, NULL); */

            SelectObject(hdc, oldbrush);
            DeleteObject(fillcolour);
            SelectObject(hdc, oldpen);
            DeleteObject(edge);
        }
        SelectObject(hdc, GetStockObject(SYSTEM_FONT));
        SelectObject(hdc, GetStockObject(WHITE_PEN));
        EndPaint(hwnd, &p);
        ShowCaret(hwnd);
    }
    return 0;
    case WM_NETEVENT:
        /* Notice we can get multiple netevents, FD_READ, FD_WRITE etc
         * but the only one that's likely to try to overload us is FD_READ.
         * This means buffering just one is fine.
         */
        if (pending_netevent)
            enact_pending_netevent();

        pending_netevent = TRUE;
        pend_netevent_wParam = wParam;
        pend_netevent_lParam = lParam;
        if (WSAGETSELECTEVENT(lParam) != FD_READ)
            enact_pending_netevent();

        net_pending_errors();
        return 0;
    case WM_SETFOCUS:
        term_set_focus(term, TRUE);
        CreateCaret(hwnd, caretbm, font_width, font_height);
        ShowCaret(hwnd);
        flash_window(0); /* stop */
        compose_state = 0;
        term_update(term);
        break;
    case WM_KILLFOCUS:
        show_mouseptr(1);
        term_set_focus(term, FALSE);
        DestroyCaret();
        caret_x = caret_y = -1; /* ensure caret is replaced next time */
        term_update(term);
        break;
    case WM_ENTERSIZEMOVE:
#ifdef RDB_DEBUG_PATCH
        debug((27, "WM_ENTERSIZEMOVE"));
#endif
        //        EnableSizeTip(1);
        resizing = TRUE;
        need_backend_resize = FALSE;
        break;
    case WM_EXITSIZEMOVE:
        //        EnableSizeTip(0);
        resizing = FALSE;
#ifdef RDB_DEBUG_PATCH
        debug((27, "WM_EXITSIZEMOVE"));
#endif
        if (need_backend_resize)
        {
            term_size(term, cfg.height, cfg.width, cfg.savelines);
            InvalidateRect(hwnd, NULL, TRUE);
        }
        break;
    case WM_SIZING:
        /*
         * This does two jobs:
         * 1) Keep the sizetip uptodate
         * 2) Make sure the window size is _stepped_ in units of the font size.
         */
        if (cfg.resize_action == RESIZE_TERM
                || (cfg.resize_action == RESIZE_EITHER && !is_alt_pressed()))
        {
            int width, height, w, h, ew, eh;
            LPRECT r = (LPRECT) lParam;

            if (!need_backend_resize && cfg.resize_action == RESIZE_EITHER
                    && (cfg.height != term->rows || cfg.width != term->cols))
            {
                /*
                 * Great! It seems that both the terminal size and the
                 * font size have been changed and the user is now dragging.
                 *
                 * It will now be difficult to get back to the configured
                 * font size!
                 *
                 * This would be easier but it seems to be too confusing.

                 term_size(term, cfg.height, cfg.width, cfg.savelines);
                 reset_window(2);
                 */
                cfg.height = term->rows;
                cfg.width = term->cols;

                InvalidateRect(hwnd, NULL, TRUE);
                need_backend_resize = TRUE;
            }

            width = r->right - r->left - extra_width;
            height = r->bottom - r->top - extra_height;
            w = (width + font_width / 2) / font_width;
            if (w < 1)
                w = 1;
            h = (height + font_height / 2) / font_height;
            if (h < 1)
                h = 1;
            //            UpdateSizeTip(hwnd, w, h);
            ew = width - w * font_width;
            eh = height - h * font_height;
            if (ew != 0)
            {
                if (wParam == WMSZ_LEFT || wParam == WMSZ_BOTTOMLEFT
                        || wParam == WMSZ_TOPLEFT)
                    r->left += ew;
                else
                    r->right -= ew;
            }
            if (eh != 0)
            {
                if (wParam == WMSZ_TOP || wParam == WMSZ_TOPRIGHT
                        || wParam == WMSZ_TOPLEFT)
                    r->top += eh;
                else
                    r->bottom -= eh;
            }
            if (ew || eh)
                return 1;
            else
                return 0;
        }
        else
        {
            int width, height, w, h, rv = 0;
            int ex_width = extra_width + (cfg.window_border - offset_width) * 2;
            int ex_height = extra_height
                            + (cfg.window_border - offset_height) * 2;
            LPRECT r = (LPRECT) lParam;

            width = r->right - r->left - ex_width;
            height = r->bottom - r->top - ex_height;

            w = (width + term->cols / 2) / term->cols;
            h = (height + term->rows / 2) / term->rows;
            if (r->right != r->left + w * term->cols + ex_width)
                rv = 1;

            if (wParam == WMSZ_LEFT || wParam == WMSZ_BOTTOMLEFT
                    || wParam == WMSZ_TOPLEFT)
                r->left = r->right - w * term->cols - ex_width;
            else
                r->right = r->left + w * term->cols + ex_width;

            if (r->bottom != r->top + h * term->rows + ex_height)
                rv = 1;

            if (wParam == WMSZ_TOP || wParam == WMSZ_TOPRIGHT
                    || wParam == WMSZ_TOPLEFT)
                r->top = r->bottom - h * term->rows - ex_height;
            else
                r->bottom = r->top + h * term->rows + ex_height;

            return rv;
        }
        /* break;  (never reached) */
    case WM_FULLSCR_ON_MAX:
        fullscr_on_max = TRUE;
        break;
    case WM_MOVE:
        sys_cursor_update();
        break;
    case WM_SIZE:
#ifdef RDB_DEBUG_PATCH
        debug((27, "WM_SIZE %s (%d,%d)",
               (wParam == SIZE_MINIMIZED) ? "SIZE_MINIMIZED" :
               (wParam == SIZE_MAXIMIZED) ? "SIZE_MAXIMIZED" :
               (wParam == SIZE_RESTORED && resizing) ? "to" :
               (wParam == SIZE_RESTORED) ? "SIZE_RESTORED" :
               "...",
               LOWORD(lParam), HIWORD(lParam)));
#endif
        if (wParam == SIZE_MINIMIZED)
            SetWindowText(hwnd, cfg.win_name_always ? window_name : icon_name);
        if (wParam == SIZE_RESTORED || wParam == SIZE_MAXIMIZED)
            SetWindowText(hwnd, window_name);
        if (wParam == SIZE_RESTORED)
        {
            processed_resize = FALSE;
            clear_full_screen();
            if (processed_resize)
            {
                /*
                 * Inhibit normal processing of this WM_SIZE; a
                 * secondary one was triggered just now by
                 * clear_full_screen which contained the correct
                 * client area size.
                 */
                return 0;
            }
        }
        if (wParam == SIZE_MAXIMIZED && fullscr_on_max)
        {
            fullscr_on_max = FALSE;
            processed_resize = FALSE;
            make_full_screen();
            if (processed_resize)
            {
                /*
                 * Inhibit normal processing of this WM_SIZE; a
                 * secondary one was triggered just now by
                 * make_full_screen which contained the correct client
                 * area size.
                 */
                return 0;
            }
        }

        processed_resize = TRUE;

        if (cfg.resize_action == RESIZE_DISABLED)
        {
            /* A resize, well it better be a minimize. */
            reset_window(-1);
        }
        else
        {

            int width, height, w, h;

            width = LOWORD(lParam);
            height = HIWORD(lParam);

            if (wParam == SIZE_MAXIMIZED && !was_zoomed)
            {
                was_zoomed = 1;
                prev_rows = term->rows;
                prev_cols = term->cols;
                if (cfg.resize_action == RESIZE_TERM)
                {
                    w = width / font_width;
                    if (w < 1)
                        w = 1;
                    h = height / font_height;
                    if (h < 1)
                        h = 1;

                    term_size(term, h, w, cfg.savelines);
                }
                reset_window(0);
            }
            else if (wParam == SIZE_RESTORED && was_zoomed)
            {
                was_zoomed = 0;
                if (cfg.resize_action == RESIZE_TERM)
                {
                    w = (width - cfg.window_border * 2) / font_width;
                    if (w < 1)
                        w = 1;
                    h = (height - cfg.window_border * 2) / font_height;
                    if (h < 1)
                        h = 1;
                    term_size(term, h, w, cfg.savelines);
                    reset_window(2);
                }
                else if (cfg.resize_action != RESIZE_FONT)
                    reset_window(2);
                else
                    reset_window(0);
            }
            else if (wParam == SIZE_MINIMIZED)
            {
                /* do nothing */
            }
            else if (cfg.resize_action == RESIZE_TERM
                     || (cfg.resize_action == RESIZE_EITHER && !is_alt_pressed()))
            {
                w = (width - cfg.window_border * 2) / font_width;
                if (w < 1)
                    w = 1;
                h = (height - cfg.window_border * 2) / font_height;
                if (h < 1)
                    h = 1;

                if (resizing)
                {
                    /*
                     * Don't call back->size in mid-resize. (To
                     * prevent massive numbers of resize events
                     * getting sent down the connection during an NT
                     * opaque drag.)
                     */
                    need_backend_resize = TRUE;
                    cfg.height = h;
                    cfg.width = w;
                }
                else
                {
                    term_size(term, h, w, cfg.savelines);
                }
            }
            else
            {
                reset_window(0);
            }
        }
        sys_cursor_update();
        return 0;
    case WM_VSCROLL:
        switch(LOWORD(wParam)
              )
        {
        case SB_BOTTOM:
            term_scroll(term, -1, 0);
            break;
        case SB_TOP:
            term_scroll(term, +1, 0);
            break;
        case SB_LINEDOWN:
            term_scroll(term, 0, +1);
            break;
        case SB_LINEUP:
            term_scroll(term, 0, -1);
            break;
        case SB_PAGEDOWN:
            term_scroll(term, 0, +term->rows / 2);
            break;
        case SB_PAGEUP:
            term_scroll(term, 0, -term->rows / 2);
            break;
        case SB_THUMBPOSITION:
        case SB_THUMBTRACK:
            term_scroll(term, 1, HIWORD(wParam));
            break;
        }
        break;
    case WM_PALETTECHANGED:
        if ((HWND) wParam != hwnd && pal != NULL)
        {
            HDC hdc = get_ctx(NULL);
            if (hdc)
            {
                if (RealizePalette(hdc) > 0)
                    UpdateColors(hdc);
                free_ctx(hdc);
            }
        }
        break;
    case WM_QUERYNEWPALETTE:
        if (pal != NULL)
        {
            HDC hdc = get_ctx(NULL);
            if (hdc)
            {
                if (RealizePalette(hdc) > 0)
                    UpdateColors(hdc);
                free_ctx(hdc);
                return TRUE;
            }
        }
        return FALSE;
    case WM_KEYDOWN:
    case WM_SYSKEYDOWN:
    case WM_KEYUP:
    case WM_SYSKEYUP:
        /*
         * Add the scan code and keypress timing to the random
         * number noise.
         */
        noise_ultralight(lParam);

        /*
         * We don't do TranslateMessage since it disassociates the
         * resulting CHAR message from the KEYDOWN that sparked it,
         * which we occasionally don't want. Instead, we process
         * KEYDOWN, and call the Win32 translator functions so that
         * we get the translations under _our_ control.
         */
        {
            unsigned char buf[20];
            int len;

            if (wParam == VK_PROCESSKEY)
            {
                /* IME PROCESS key */
                if (message == WM_KEYDOWN)
                {
                    MSG m;
                    m.hwnd = hwnd;
                    m.message = WM_KEYDOWN;
                    m.wParam = wParam;
                    m.lParam = lParam & 0xdfff;
                    TranslateMessage(&m);
                }
                else break; /* pass to Windows for default processing */
            }
            else
            {
                len = TranslateKey(message, wParam, lParam, buf);
                if (len == -1)
                    return DefWindowProc(hwnd, message, wParam, lParam);

                if (len != 0)
                {
                    /*
                     * Interrupt an ongoing paste. I'm not sure
                     * this is sensible, but for the moment it's
                     * preferable to having to faff about buffering
                     * things.
                     */
                    term_nopaste(term);

                    /*
                     * We need not bother about stdin backlogs
                     * here, because in GUI PuTTY we can't do
                     * anything about it anyway; there's no means
                     * of asking Windows to hold off on KEYDOWN
                     * messages. We _have_ to buffer everything
                     * we're sent.
                     */
                    term_seen_key_event(term);
                    if (ldisc)
                        ldisc_send(ldisc, buf, len, 1);
                    show_mouseptr(0);
                }
            }
        }
        net_pending_errors();
        return 0;
    case WM_INPUTLANGCHANGE:
        /* wParam == Font number */
        /* lParam == Locale */
        set_input_locale((HKL)lParam);
        sys_cursor_update();
        break;
    case WM_IME_STARTCOMPOSITION:
    {
        HIMC hImc = ImmGetContext(hwnd);
        ImmSetCompositionFont(hImc, &lfont);
        ImmReleaseContext(hwnd, hImc);
    }
    break;
    case WM_IME_COMPOSITION:
    {
        HIMC hIMC;
        int n;
        char *buff;

        if(osVersion.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS ||
                osVersion.dwPlatformId == VER_PLATFORM_WIN32s) break; /* no Unicode */

        if ((lParam & GCS_RESULTSTR) == 0) /* Composition unfinished. */
            break; /* fall back to DefWindowProc */

        hIMC = ImmGetContext(hwnd);
        n = ImmGetCompositionStringW(hIMC, GCS_RESULTSTR, NULL, 0);

        if (n > 0)
        {
            int i;
            buff = snewn(n, char);
            ImmGetCompositionStringW(hIMC, GCS_RESULTSTR, buff, n);
            /*
             * Jaeyoun Chung reports that Korean character
             * input doesn't work correctly if we do a single
             * luni_send() covering the whole of buff. So
             * instead we luni_send the characters one by one.
             */
            term_seen_key_event(term);
            for (i = 0; i < n; i += 2)
            {
                if (ldisc)
                    luni_send(ldisc, (unsigned short *)(buff + i), 1, 1);
            }
            free(buff);
        }
        ImmReleaseContext(hwnd, hIMC);
        return 1;
    }

    case WM_IME_CHAR:
        if (wParam & 0xFF00)
        {
            unsigned char buf[2];

            buf[1] = wParam;
            buf[0] = wParam >> 8;
            term_seen_key_event(term);
            if (ldisc)
                lpage_send(ldisc, kbd_codepage, buf, 2, 1);
        }
        else
        {
            char c = (unsigned char) wParam;
            term_seen_key_event(term);
            if (ldisc)
                lpage_send(ldisc, kbd_codepage, &c, 1, 1);
        }
        return (0);
    case WM_CHAR:
    case WM_SYSCHAR:
        /*
         * Nevertheless, we are prepared to deal with WM_CHAR
         * messages, should they crop up. So if someone wants to
         * post the things to us as part of a macro manoeuvre,
         * we're ready to cope.
         */
    {
        char c = (unsigned char)wParam;
        term_seen_key_event(term);
        if (ldisc)
            lpage_send(ldisc, CP_ACP, &c, 1, 1);
    }
    return 0;
    case WM_SYSCOLORCHANGE:
        if (cfg.system_colour)
        {
            /* Refresh palette from system colours. */
            /* XXX actually this zaps the entire palette. */
            systopalette();
            init_palette();
            /* Force a repaint of the terminal window. */
            term_invalidate(term);
        }
        break;
    case WM_AGENT_CALLBACK:
    {
        struct agent_callback *c = (struct agent_callback *)lParam;
        c->callback(c->callback_ctx, c->data, c->len);
        sfree(c);
    }
    return 0;
    case WM_GOT_CLIPDATA:
        if (process_clipdata((HGLOBAL)lParam, wParam))
            term_do_paste(term);
        return 0;
    default:
        if (message == wm_mousewheel || message == WM_MOUSEWHEEL)
        {
            int shift_pressed = 0, control_pressed = 0;

            if (message == WM_MOUSEWHEEL)
            {
                wheel_accumulator += (short)HIWORD(wParam);
                shift_pressed = LOWORD(wParam) & MK_SHIFT;
                control_pressed = LOWORD(wParam) & MK_CONTROL;
            }
            else
            {
                BYTE keys[256];
                wheel_accumulator += (int)wParam;
                if (GetKeyboardState(keys) != 0)
                {
                    shift_pressed = keys[VK_SHIFT] & 0x80;
                    control_pressed = keys[VK_CONTROL] & 0x80;
                }
            }

            /* process events when the threshold is reached */
            while (abs(wheel_accumulator) >= WHEEL_DELTA)
            {
                int b;

                /* reduce amount for next time */
                if (wheel_accumulator > 0)
                {
                    b = MBT_WHEEL_UP;
                    wheel_accumulator -= WHEEL_DELTA;
                }
                else if (wheel_accumulator < 0)
                {
                    b = MBT_WHEEL_DOWN;
                    wheel_accumulator += WHEEL_DELTA;
                }
                else
                    break;

                if (send_raw_mouse &&
                        !(cfg.mouse_override && shift_pressed))
                {
                    /* Mouse wheel position is in screen coordinates for
                     * some reason */
                    POINT p;
                    p.x = X_POS(lParam);
                    p.y = Y_POS(lParam);
                    if (ScreenToClient(hwnd, &p))
                    {
                        /* send a mouse-down followed by a mouse up */
                        term_mouse(term, b, translate_button(b),
                                   MA_CLICK,
                                   TO_CHR_X(p.x),
                                   TO_CHR_Y(p.y), shift_pressed,
                                   control_pressed, is_alt_pressed());
                        term_mouse(term, b, translate_button(b),
                                   MA_RELEASE, TO_CHR_X(p.x),
                                   TO_CHR_Y(p.y), shift_pressed,
                                   control_pressed, is_alt_pressed());
                    } /* else: not sure when this can fail */
                }
                else
                {
                    /* trigger a scroll */
                    term_scroll(term, 0,
                                b == MBT_WHEEL_UP ?
                                -term->rows / 2 : term->rows / 2);
                }
            }
            return 0;
        }
    }

    /*
     * Any messages we don't process completely above are passed through to
     * DefWindowProc() for default processing.
     */
    return DefWindowProc(hwnd, message, wParam, lParam);
}

/*
 * Move the system caret. (We maintain one, even though it's
 * invisible, for the benefit of blind people: apparently some
 * helper software tracks the system caret, so we should arrange to
 * have one.)
 */
void sys_cursor(void *frontend, int x, int y)
{
    int cx, cy;

    if (!term->has_focus)
        return;

    /*
     * Avoid gratuitously re-updating the cursor position and IMM
     * window if there's no actual change required.
     */
    cx = x * font_width + offset_width;
    cy = y * font_height + offset_height;
    if (cx == caret_x && cy == caret_y)
        return;
    caret_x = cx;
    caret_y = cy;

    sys_cursor_update();
}

static void sys_cursor_update(void)
{
    COMPOSITIONFORM cf;
    HIMC hIMC;

    if (!term->has_focus)
        return;

    if (caret_x < 0 || caret_y < 0)
        return;

    SetCaretPos(caret_x, caret_y);

    /* IMM calls on Win98 and beyond only */
    if (osVersion.dwPlatformId == VER_PLATFORM_WIN32s)
        return; /* 3.11 */

    if (osVersion.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS
            && osVersion.dwMinorVersion == 0)
        return; /* 95 */

    /* we should have the IMM functions */
    hIMC = ImmGetContext(hwnd);
    cf.dwStyle = CFS_POINT;
    cf.ptCurrentPos.x = caret_x;
    cf.ptCurrentPos.y = caret_y;
    ImmSetCompositionWindow(hIMC, &cf);

    ImmReleaseContext(hwnd, hIMC);
}

/*
 * Draw a line of text in the window, at given character
 * coordinates, in given attributes.
 *
 * We are allowed to fiddle with the contents of `text'.
 */
void do_text_internal(Context ctx, int x, int y, wchar_t *text, int len,
                      unsigned long attr, int lattr)
{
    COLORREF fg, bg, t;
    int nfg, nbg, nfont;
    HDC hdc = ctx;
    RECT line_box;
    int force_manual_underline = 0;
    int fnt_width, char_width;
    int text_adjust = 0;
    int xoffset = 0;
    int maxlen, remaining, opaque;
    static int *lpDx = NULL;
    static int lpDx_len = 0;
    int *lpDx_maybe;

    lattr &= LATTR_MODE;

    char_width = fnt_width = font_width * (1 + (lattr != LATTR_NORM));

    if (attr & ATTR_WIDE)
        char_width *= 2;

    /* Only want the left half of double width lines */
    if (lattr != LATTR_NORM && x * 2 >= term->cols)
        return;

    x *= fnt_width;
    y *= font_height;
    x += offset_width;
    y += offset_height;

    if ((attr & TATTR_ACTCURS) && (cfg.cursor_type == 0 || term->big_cursor))
    {
        attr &= ~(ATTR_REVERSE | ATTR_BLINK | ATTR_COLOURS);
        if (bold_mode == BOLD_COLOURS)
            attr &= ~ATTR_BOLD;

        /* cursor fg and bg */
        attr |= (260 << ATTR_FGSHIFT) | (261 << ATTR_BGSHIFT);
    }

    nfont = 0;
    if (cfg.vtmode == VT_POORMAN && lattr != LATTR_NORM)
    {
        /* Assume a poorman font is borken in other ways too. */
        lattr = LATTR_WIDE;
    }
    else
        switch (lattr)
        {
        case LATTR_NORM:
            break;
        case LATTR_WIDE:
            nfont |= FONT_WIDE;
            break;
        default:
            nfont |= FONT_WIDE + FONT_HIGH;
            break;
        }
    if (attr & ATTR_NARROW)
        nfont |= FONT_NARROW;

    /* Special hack for the VT100 linedraw glyphs. */
    if (text[0] >= 0x23BA && text[0] <= 0x23BD)
    {
        switch ((unsigned char) (text[0]))
        {
        case 0xBA:
            text_adjust = -2 * font_height / 5;
            break;
        case 0xBB:
            text_adjust = -1 * font_height / 5;
            break;
        case 0xBC:
            text_adjust = font_height / 5;
            break;
        case 0xBD:
            text_adjust = 2 * font_height / 5;
            break;
        }
        if (lattr == LATTR_TOP || lattr == LATTR_BOT)
            text_adjust *= 2;
        text[0] = ucsdata.unitab_xterm['q'];
        if (attr & ATTR_UNDER)
        {
            attr &= ~ATTR_UNDER;
            force_manual_underline = 1;
        }
    }

    /* Anything left as an original character set is unprintable. */
    if (DIRECT_CHAR(text[0]))
    {
        int i;
        for (i = 0; i < len; i++)
            text[i] = 0xFFFD;
    }

    /* OEM CP */
    if ((text[0] & CSET_MASK) == CSET_OEMCP)
        nfont |= FONT_OEM;

    nfg = ((attr & ATTR_FGMASK) >> ATTR_FGSHIFT);
    nbg = ((attr & ATTR_BGMASK) >> ATTR_BGSHIFT);
    if (bold_mode == BOLD_FONT && (attr & ATTR_BOLD))
        nfont |= FONT_BOLD;
    if (und_mode == UND_FONT && (attr & ATTR_UNDER))
        nfont |= FONT_UNDERLINE;
    another_font(nfont);
    if (!fonts[nfont])
    {
        if (nfont & FONT_UNDERLINE)
            force_manual_underline = 1;
        /* Don't do the same for manual bold, it could be bad news. */

        nfont &= ~(FONT_BOLD | FONT_UNDERLINE);
    }
    another_font(nfont);
    if (!fonts[nfont])
        nfont = FONT_NORMAL;
    if (attr & ATTR_REVERSE)
    {
        t = nfg;
        nfg = nbg;
        nbg = t;
    }
    if (bold_mode == BOLD_COLOURS && (attr & ATTR_BOLD))
    {
        if (nfg < 16)
            nfg |= 8;
        else if (nfg >= 256)
            nfg |= 1;
    }
    if (bold_mode == BOLD_COLOURS && (attr & ATTR_BLINK))
    {
        if (nbg < 16)
            nbg |= 8;
        else if (nbg >= 256)
            nbg |= 1;
    }
    fg = colours[nfg];
    bg = colours[nbg];
    SelectObject(hdc, fonts[nfont]);
    SetTextColor(hdc, fg);
    SetBkColor(hdc, bg);
    if (attr & TATTR_COMBINING)
        SetBkMode(hdc, TRANSPARENT);
    else
        SetBkMode(hdc, OPAQUE);
    line_box.left = x;
    line_box.top = y;
    line_box.right = x + char_width * len;
    line_box.bottom = y + font_height;

    /* Only want the left half of double width lines */
    if (line_box.right > font_width * term->cols + offset_width)
        line_box.right = font_width * term->cols + offset_width;

    if (font_varpitch)
    {
        /*
         * If we're using a variable-pitch font, we unconditionally
         * draw the glyphs one at a time and centre them in their
         * character cells (which means in particular that we must
         * disable the lpDx mechanism). This gives slightly odd but
         * generally reasonable results.
         */
        xoffset = char_width / 2;
        SetTextAlign(hdc, TA_TOP | TA_CENTER | TA_NOUPDATECP);
        lpDx_maybe = NULL;
        maxlen = 1;
    }
    else
    {
        /*
         * In a fixed-pitch font, we draw the whole string in one go
         * in the normal way.
         */
        xoffset = 0;
        SetTextAlign(hdc, TA_TOP | TA_LEFT | TA_NOUPDATECP);
        lpDx_maybe = lpDx;
        maxlen = len;
    }

    opaque = TRUE; /* start by erasing the rectangle */
    for (remaining = len; remaining > 0;
            text += len, remaining -= len, x += char_width * len)
    {
        len = (maxlen < remaining ? maxlen : remaining);

        if (len > lpDx_len)
        {
            if (len > lpDx_len)
            {
                lpDx_len = len * 9 / 8 + 16;
                lpDx = sresize(lpDx, lpDx_len, int);
            }
        }
        {
            int i;
            for (i = 0; i < len; i++)
                lpDx[i] = char_width;
        }

        /* We're using a private area for direct to font. (512 chars.) */
        if (ucsdata.dbcs_screenfont && (text[0] & CSET_MASK) == CSET_ACP)
        {
            /* Ho Hum, dbcs fonts are a PITA! */
            /* To display on W9x I have to convert to UCS */
            static wchar_t *uni_buf = 0;
            static int uni_len = 0;
            int nlen, mptr;
            if (len > uni_len)
            {
                sfree(uni_buf);
                uni_len = len;
                uni_buf = snewn(uni_len, wchar_t);
            }

            for (nlen = mptr = 0; mptr < len; mptr++)
            {
                uni_buf[nlen] = 0xFFFD;
                if (IsDBCSLeadByteEx(ucsdata.font_codepage, (BYTE) text[mptr]))
                {
                    char dbcstext[2];
                    dbcstext[0] = text[mptr] & 0xFF;
                    dbcstext[1] = text[mptr + 1] & 0xFF;
                    lpDx[nlen] += char_width;
                    MultiByteToWideChar(ucsdata.font_codepage, MB_USEGLYPHCHARS, dbcstext, 2,
                                        uni_buf + nlen, 1);
                    mptr++;
                }
                else
                {
                    char dbcstext[1];
                    dbcstext[0] = text[mptr] & 0xFF;
                    MultiByteToWideChar(ucsdata.font_codepage, MB_USEGLYPHCHARS, dbcstext, 1,
                                        uni_buf + nlen, 1);
                }
                nlen++;
            }
            if (nlen <= 0)
                return; /* Eeek! */

            ExtTextOutW(hdc, x + xoffset,
                        y - font_height * (lattr == LATTR_BOT) + text_adjust,
                        ETO_CLIPPED | (opaque ? ETO_OPAQUE : 0), &line_box, uni_buf, nlen, lpDx_maybe);
            if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD))
            {
                SetBkMode(hdc, TRANSPARENT);
                ExtTextOutW(hdc, x + xoffset - 1,
                            y - font_height * (lattr == LATTR_BOT) + text_adjust, ETO_CLIPPED, &line_box,
                            uni_buf, nlen, lpDx_maybe);
            }

            lpDx[0] = -1;
        }
        else if (DIRECT_FONT(text[0]))
        {
            static char *directbuf = NULL;
            static int directlen = 0;
            int i;
            if (len > directlen)
            {
                directlen = len;
                directbuf = sresize(directbuf, directlen, char);
            }

            for (i = 0; i < len; i++)
                directbuf[i] = text[i] & 0xFF;

            ExtTextOut(hdc, x + xoffset,
                       y - font_height * (lattr == LATTR_BOT) + text_adjust,
                       ETO_CLIPPED | (opaque ? ETO_OPAQUE : 0), &line_box, directbuf, len, lpDx_maybe);
            if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD))
            {
                SetBkMode(hdc, TRANSPARENT);

                /* GRR: This draws the character outside its box and
                 * can leave 'droppings' even with the clip box! I
                 * suppose I could loop it one character at a time ...
                 * yuk.
                 *
                 * Or ... I could do a test print with "W", and use +1
                 * or -1 for this shift depending on if the leftmost
                 * column is blank...
                 */
                ExtTextOut(hdc, x + xoffset - 1,
                           y - font_height * (lattr == LATTR_BOT) + text_adjust, ETO_CLIPPED, &line_box,
                           directbuf, len, lpDx_maybe);
            }
        }
        else
        {
            /* And 'normal' unicode characters */
            static WCHAR *wbuf = NULL;
            static int wlen = 0;
            int i;

            if (wlen < len)
            {
                sfree(wbuf);
                wlen = len;
                wbuf = snewn(wlen, WCHAR);
            }

            for (i = 0; i < len; i++)
                wbuf[i] = text[i];

            /* print Glyphs as they are, without Windows' Shaping*/
            general_textout(hdc, x + xoffset,
                            y - font_height * (lattr == LATTR_BOT) + text_adjust, &line_box, wbuf, len,
                            lpDx, opaque && !(attr & TATTR_COMBINING));

            /* And the shadow bold hack. */
            if (bold_mode == BOLD_SHADOW && (attr & ATTR_BOLD))
            {
                SetBkMode(hdc, TRANSPARENT);
                ExtTextOutW(hdc, x + xoffset - 1,
                            y - font_height * (lattr == LATTR_BOT) + text_adjust, ETO_CLIPPED, &line_box,
                            wbuf, len, lpDx_maybe);
            }
        }

        /*
         * If we're looping round again, stop erasing the background
         * rectangle.
         */
        SetBkMode(hdc, TRANSPARENT);
        opaque = FALSE;
    }
    if (lattr != LATTR_TOP
            && (force_manual_underline || (und_mode == UND_LINE && (attr & ATTR_UNDER))))
    {
        HPEN oldpen;
        int dec = descent;
        if (lattr == LATTR_BOT)
            dec = dec * 2 - font_height;

        oldpen = SelectObject(hdc, CreatePen(PS_SOLID, 0, fg));
        MoveToEx(hdc, line_box.left, line_box.top + dec, NULL);
        LineTo(hdc, line_box.right, line_box.top + dec);
        oldpen = SelectObject(hdc, oldpen);
        DeleteObject(oldpen);
    }
}

/*
 * Wrapper that handles combining characters.
 */
void do_text(Context ctx, int x, int y, wchar_t *text, int len,
             unsigned long attr, int lattr)
{
    if (attr & TATTR_COMBINING)
    {
        unsigned long a = 0;
        attr &= ~TATTR_COMBINING;
        while (len--)
        {
            do_text_internal(ctx, x, y, text, 1, attr | a, lattr);
            text++;
            a = TATTR_COMBINING;
        }
    }
    else
        do_text_internal(ctx, x, y, text, len, attr, lattr);
}

void do_cursor(Context ctx, int x, int y, wchar_t *text, int len,
               unsigned long attr, int lattr)
{

    int fnt_width;
    int char_width;
    HDC hdc = ctx;
    int ctype = cfg.cursor_type;

    lattr &= LATTR_MODE;

    if ((attr & TATTR_ACTCURS) && (ctype == 0 || term->big_cursor))
    {
        if (*text != UCSWIDE)
        {
            do_text(ctx, x, y, text, len, attr, lattr);
            return;
        }
        ctype = 2;
        attr |= TATTR_RIGHTCURS;
    }

    fnt_width = char_width = font_width * (1 + (lattr != LATTR_NORM));
    if (attr & ATTR_WIDE)
        char_width *= 2;
    x *= fnt_width;
    y *= font_height;
    x += offset_width;
    y += offset_height;

    if ((attr & TATTR_PASCURS) && (ctype == 0 || term->big_cursor))
    {
        POINT pts[5];
        HPEN oldpen;
        pts[0].x = pts[1].x = pts[4].x = x;
        pts[2].x = pts[3].x = x + char_width - 1;
        pts[0].y = pts[3].y = pts[4].y = y;
        pts[1].y = pts[2].y = y + font_height - 1;
        oldpen = SelectObject(hdc, CreatePen(PS_SOLID, 0, colours[261]));
        Polyline(hdc, pts, 5);
        oldpen = SelectObject(hdc, oldpen);
        DeleteObject(oldpen);
    }
    else if ((attr & (TATTR_ACTCURS | TATTR_PASCURS)) && ctype != 0)
    {
        int startx, starty, dx, dy, length, i;
        if (ctype == 1)
        {
            startx = x;
            starty = y + descent;
            dx = 1;
            dy = 0;
            length = char_width;
        }
        else
        {
            int xadjust = 0;
            if (attr & TATTR_RIGHTCURS)
                xadjust = char_width - 1;
            startx = x + xadjust;
            starty = y;
            dx = 0;
            dy = 1;
            length = font_height;
        }
        if (attr & TATTR_ACTCURS)
        {
            HPEN oldpen;
            oldpen = SelectObject(hdc, CreatePen(PS_SOLID, 0, colours[261]));
            MoveToEx(hdc, startx, starty, NULL);
            LineTo(hdc, startx + dx * length, starty + dy * length);
            oldpen = SelectObject(hdc, oldpen);
            DeleteObject(oldpen);
        }
        else
        {
            for (i = 0; i < length; i++)
            {
                if (i % 2 == 0)
                {
                    SetPixel(hdc, startx, starty, colours[261]);
                }
                startx += dx;
                starty += dy;
            }
        }
    }
}

/* This function gets the actual width of a character in the normal font.
 */
int char_width(Context ctx, int uc)
{
    HDC hdc = ctx;
    int ibuf = 0;

    /* If the font max is the same as the font ave width then this
     * function is a no-op.
     */
    if (!font_dualwidth)
        return 1;

    switch (uc & CSET_MASK)
    {
    case CSET_ASCII:
        uc = ucsdata.unitab_line[uc & 0xFF];
        break;
    case CSET_LINEDRW:
        uc = ucsdata.unitab_xterm[uc & 0xFF];
        break;
    case CSET_SCOACS:
        uc = ucsdata.unitab_scoacs[uc & 0xFF];
        break;
    }
    if (DIRECT_FONT(uc))
    {
        if (ucsdata.dbcs_screenfont)
            return 1;

        /* Speedup, I know of no font where ascii is the wrong width */
        if ((uc & ~CSET_MASK) >= ' ' && (uc & ~CSET_MASK) <= '~')
            return 1;

        if ((uc & CSET_MASK) == CSET_ACP)
        {
            SelectObject(hdc, fonts[FONT_NORMAL]);
        }
        else if ((uc & CSET_MASK) == CSET_OEMCP)
        {
            another_font(FONT_OEM);
            if (!fonts[FONT_OEM])
                return 0;

            SelectObject(hdc, fonts[FONT_OEM]);
        }
        else
            return 0;

        if (GetCharWidth32(hdc, uc & ~CSET_MASK, uc & ~CSET_MASK, &ibuf) != 1
                && GetCharWidth(hdc, uc & ~CSET_MASK, uc & ~CSET_MASK, &ibuf) != 1)
            return 0;
    }
    else
    {
        /* Speedup, I know of no font where ascii is the wrong width */
        if (uc >= ' ' && uc <= '~')
            return 1;

        SelectObject(hdc, fonts[FONT_NORMAL]);
        if (GetCharWidth32W(hdc, uc, uc, &ibuf) == 1)
            /* Okay that one worked */;
        else if (GetCharWidthW(hdc, uc, uc, &ibuf) == 1)
            /* This should work on 9x too, but it's "less accurate" */;
        else
            return 0;
    }

    ibuf += font_width / 2 - 1;
    ibuf /= font_width;

    return ibuf;
}

/*
 * Translate a WM_(SYS)?KEY(UP|DOWN) message into a string of ASCII
 * codes. Returns number of bytes used, zero to drop the message,
 * -1 to forward the message to Windows, or another negative number
 * to indicate a NUL-terminated "special" string.
 */
static int TranslateKey(UINT message, WPARAM wParam, LPARAM lParam,
                        unsigned char *output)
{
    BYTE keystate[256];
    int scan, left_alt = 0, key_down, shift_state;
    int r, i, code;
    unsigned char *p = output;
    static int alt_sum = 0;

    HKL kbd_layout = GetKeyboardLayout(0);

    /* keys is for ToAsciiEx. There's some ick here, see below. */
    static WORD keys[3];
    static int compose_char = 0;
    static WPARAM compose_key = 0;

    r = GetKeyboardState(keystate);
    if (!r)
        memset(keystate, 0, sizeof(keystate));
    else
    {
#if 0
#define SHOW_TOASCII_RESULT
        {
            /* Tell us all about key events */
            static BYTE oldstate[256];
            static int first = 1;
            static int scan;
            int ch;
            if (first)
                memcpy(oldstate, keystate, sizeof(oldstate));
            first = 0;

            if ((HIWORD(lParam) & (KF_UP | KF_REPEAT)) == KF_REPEAT)
            {
                debug(("+"));
            }
            else if ((HIWORD(lParam) & KF_UP)
            && scan == (HIWORD(lParam) & 0xFF))
            {
                debug((". U"));
            }
            else
            {
                debug((".\n"));
                if (wParam >= VK_F1 && wParam <= VK_F20)
                    debug(("K_F%d", wParam + 1 - VK_F1));
                else
                    switch (wParam)
                    {
                    case VK_SHIFT:
                        debug(("SHIFT"));
                        break;
                    case VK_CONTROL:
                        debug(("CTRL"));
                        break;
                    case VK_MENU:
                        debug(("ALT"));
                        break;
                    default:
                        debug(("VK_%02x", wParam));
                    }
                if (message == WM_SYSKEYDOWN || message == WM_SYSKEYUP)
                    debug(("*"));
                debug((", S%02x", scan = (HIWORD(lParam) & 0xFF)));

                ch = MapVirtualKeyEx(wParam, 2, kbd_layout);
                if (ch >= ' ' && ch <= '~')
                    debug((", '%c'", ch));
                else if (ch)
                    debug((", $%02x", ch));

                if (keys[0])
                    debug((", KB0=%02x", keys[0]));
                if (keys[1])
                    debug((", KB1=%02x", keys[1]));
                if (keys[2])
                    debug((", KB2=%02x", keys[2]));

                if ((keystate[VK_SHIFT] & 0x80) != 0)
                    debug((", S"));
                if ((keystate[VK_CONTROL] & 0x80) != 0)
                    debug((", C"));
                if ((HIWORD(lParam) & KF_EXTENDED))
                    debug((", E"));
                if ((HIWORD(lParam) & KF_UP))
                    debug((", U"));
            }

            if ((HIWORD(lParam) & (KF_UP | KF_REPEAT)) == KF_REPEAT);
            else if ((HIWORD(lParam) & KF_UP))
                oldstate[wParam & 0xFF] ^= 0x80;
            else
                oldstate[wParam & 0xFF] ^= 0x81;

            for (ch = 0; ch < 256; ch++)
                if (oldstate[ch] != keystate[ch])
                    debug((", M%02x=%02x", ch, keystate[ch]));

            memcpy(oldstate, keystate, sizeof(oldstate));
        }
#endif

        if (wParam == VK_MENU && (HIWORD(lParam) & KF_EXTENDED))
        {
            keystate[VK_RMENU] = keystate[VK_MENU];
        }

        /* Nastyness with NUMLock - Shift-NUMLock is left alone though */
        if ((cfg.funky_type == FUNKY_VT400
                || (cfg.funky_type <= FUNKY_LINUX && term->app_keypad_keys && !cfg.no_applic_k))
                && wParam == VK_NUMLOCK && !(keystate[VK_SHIFT] & 0x80))
        {

            wParam = VK_EXECUTE;

            /* UnToggle NUMLock */
            if ((HIWORD(lParam) & (KF_UP | KF_REPEAT)) == 0)
                keystate[VK_NUMLOCK] ^= 1;
        }

        /* And write back the 'adjusted' state */
        SetKeyboardState(keystate);
    }

    /* Disable Auto repeat if required */
    if (term->repeat_off && (HIWORD(lParam) & (KF_UP | KF_REPEAT)) == KF_REPEAT)
        return 0;

    if ((HIWORD(lParam) & KF_ALTDOWN) && (keystate[VK_RMENU] & 0x80) == 0)
        left_alt = 1;

    key_down = ((HIWORD(lParam) & KF_UP) == 0);

    /* Make sure Ctrl-ALT is not the same as AltGr for ToAscii unless told. */
    if (left_alt && (keystate[VK_CONTROL] & 0x80))
    {
        if (cfg.ctrlaltkeys)
            keystate[VK_MENU] = 0;
        else
        {
            keystate[VK_RMENU] = 0x80;
            left_alt = 0;
        }
    }

    scan = (HIWORD(lParam) & (KF_UP | KF_EXTENDED | 0xFF));
    shift_state = ((keystate[VK_SHIFT] & 0x80) != 0)
                  + ((keystate[VK_CONTROL] & 0x80) != 0) * 2;

    /* Note if AltGr was pressed and if it was used as a compose key */
    if (!compose_state)
    {
        compose_key = 0x100;
        if (cfg.compose_key)
        {
            if (wParam == VK_MENU && (HIWORD(lParam) & KF_EXTENDED))
                compose_key = wParam;
        }
        if (wParam == VK_APPS)
            compose_key = wParam;
    }

    if (wParam == compose_key)
    {
        if (compose_state == 0 && (HIWORD(lParam) & (KF_UP | KF_REPEAT)) == 0)
            compose_state = 1;
        else if (compose_state == 1 && (HIWORD(lParam) & KF_UP))
            compose_state = 2;
        else
            compose_state = 0;
    }
    else if (compose_state == 1 && wParam != VK_CONTROL)
        compose_state = 0;

    if (compose_state > 1 && left_alt)
        compose_state = 0;

    /* Sanitize the number pad if not using a PC NumPad */
    if (left_alt
            || (term->app_keypad_keys && !cfg.no_applic_k && cfg.funky_type != FUNKY_XTERM)
            || cfg.funky_type == FUNKY_VT400 || cfg.nethack_keypad || compose_state)
    {
        if ((HIWORD(lParam) & KF_EXTENDED) == 0)
        {
            int nParam = 0;
            switch (wParam)
            {
            case VK_INSERT:
                nParam = VK_NUMPAD0;
                break;
            case VK_END:
                nParam = VK_NUMPAD1;
                break;
            case VK_DOWN:
                nParam = VK_NUMPAD2;
                break;
            case VK_NEXT:
                nParam = VK_NUMPAD3;
                break;
            case VK_LEFT:
                nParam = VK_NUMPAD4;
                break;
            case VK_CLEAR:
                nParam = VK_NUMPAD5;
                break;
            case VK_RIGHT:
                nParam = VK_NUMPAD6;
                break;
            case VK_HOME:
                nParam = VK_NUMPAD7;
                break;
            case VK_UP:
                nParam = VK_NUMPAD8;
                break;
            case VK_PRIOR:
                nParam = VK_NUMPAD9;
                break;
            case VK_DELETE:
                nParam = VK_DECIMAL;
                break;
            }
            if (nParam)
            {
                if (keystate[VK_NUMLOCK] & 1)
                    shift_state |= 1;
                wParam = nParam;
            }
        }
    }

    /* If a key is pressed and AltGr is not active */
    if (key_down && (keystate[VK_RMENU] & 0x80) == 0 && !compose_state)
    {
        /* Okay, prepare for most alts then ... */
        if (left_alt)
            *p++ = '\033';

        /* Lets see if it's a pattern we know all about ... */
        if (wParam == VK_PRIOR && shift_state == 1)
        {
            SendMessage(hwnd, WM_VSCROLL, SB_PAGEUP, 0);
            return 0;
        }
        if (wParam == VK_PRIOR && shift_state == 2)
        {
            SendMessage(hwnd, WM_VSCROLL, SB_LINEUP, 0);
            return 0;
        }
        if (wParam == VK_NEXT && shift_state == 1)
        {
            SendMessage(hwnd, WM_VSCROLL, SB_PAGEDOWN, 0);
            return 0;
        }
        if (wParam == VK_NEXT && shift_state == 2)
        {
            SendMessage(hwnd, WM_VSCROLL, SB_LINEDOWN, 0);
            return 0;
        }
        if ((wParam == VK_PRIOR || wParam == VK_NEXT) && shift_state == 3)
        {
            term_scroll_to_selection(term, (wParam == VK_PRIOR ? 0 : 1));
            return 0;
        }
        if (wParam == VK_INSERT && shift_state == 1)
        {
            request_paste(NULL);
            return 0;
        }
        if (left_alt && wParam == VK_F4 && cfg.alt_f4)
        {
            return -1;
        }
        if (left_alt && wParam == VK_SPACE && cfg.alt_space)
        {
            SendMessage(hwnd, WM_SYSCOMMAND, SC_KEYMENU, 0);
            return -1;
        }
        if (left_alt && wParam == VK_RETURN && cfg.fullscreenonaltenter
                && (cfg.resize_action != RESIZE_DISABLED))
        {
            if ((HIWORD(lParam) & (KF_UP | KF_REPEAT)) != KF_REPEAT)
                flip_full_screen();
            return -1;
        }
        /* Control-Numlock for app-keypad mode switch */
        if (wParam == VK_PAUSE && shift_state == 2)
        {
            term->app_keypad_keys ^= 1;
            return 0;
        }

        /* Nethack keypad */
        if (cfg.nethack_keypad && !left_alt)
        {
            switch (wParam)
            {
            case VK_NUMPAD1:
                *p++ = "bB\002\002"[shift_state & 3];
                return p - output;
            case VK_NUMPAD2:
                *p++ = "jJ\012\012"[shift_state & 3];
                return p - output;
            case VK_NUMPAD3:
                *p++ = "nN\016\016"[shift_state & 3];
                return p - output;
            case VK_NUMPAD4:
                *p++ = "hH\010\010"[shift_state & 3];
                return p - output;
            case VK_NUMPAD5:
                *p++ = shift_state ? '.' : '.';
                return p - output;
            case VK_NUMPAD6:
                *p++ = "lL\014\014"[shift_state & 3];
                return p - output;
            case VK_NUMPAD7:
                *p++ = "yY\031\031"[shift_state & 3];
                return p - output;
            case VK_NUMPAD8:
                *p++ = "kK\013\013"[shift_state & 3];
                return p - output;
            case VK_NUMPAD9:
                *p++ = "uU\025\025"[shift_state & 3];
                return p - output;
            }
        }

        /* Application Keypad */
        if (!left_alt)
        {
            int xkey = 0;

            if (cfg.funky_type == FUNKY_VT400
                    || (cfg.funky_type <= FUNKY_LINUX && term->app_keypad_keys && !cfg.no_applic_k))
                switch (wParam)
                {
                case VK_EXECUTE:
                    xkey = 'P';
                    break;
                case VK_DIVIDE:
                    xkey = 'Q';
                    break;
                case VK_MULTIPLY:
                    xkey = 'R';
                    break;
                case VK_SUBTRACT:
                    xkey = 'S';
                    break;
                }
            if (term->app_keypad_keys && !cfg.no_applic_k)
                switch (wParam)
                {
                case VK_NUMPAD0:
                    xkey = 'p';
                    break;
                case VK_NUMPAD1:
                    xkey = 'q';
                    break;
                case VK_NUMPAD2:
                    xkey = 'r';
                    break;
                case VK_NUMPAD3:
                    xkey = 's';
                    break;
                case VK_NUMPAD4:
                    xkey = 't';
                    break;
                case VK_NUMPAD5:
                    xkey = 'u';
                    break;
                case VK_NUMPAD6:
                    xkey = 'v';
                    break;
                case VK_NUMPAD7:
                    xkey = 'w';
                    break;
                case VK_NUMPAD8:
                    xkey = 'x';
                    break;
                case VK_NUMPAD9:
                    xkey = 'y';
                    break;

                case VK_DECIMAL:
                    xkey = 'n';
                    break;
                case VK_ADD:
                    if (cfg.funky_type == FUNKY_XTERM)
                    {
                        if (shift_state)
                            xkey = 'l';
                        else
                            xkey = 'k';
                    }
                    else if (shift_state)
                        xkey = 'm';
                    else
                        xkey = 'l';
                    break;

                case VK_DIVIDE:
                    if (cfg.funky_type == FUNKY_XTERM)
                        xkey = 'o';
                    break;
                case VK_MULTIPLY:
                    if (cfg.funky_type == FUNKY_XTERM)
                        xkey = 'j';
                    break;
                case VK_SUBTRACT:
                    if (cfg.funky_type == FUNKY_XTERM)
                        xkey = 'm';
                    break;

                case VK_RETURN:
                    if (HIWORD(lParam) & KF_EXTENDED)
                        xkey = 'M';
                    break;
                }
            if (xkey)
            {
                if (term->vt52_mode)
                {
                    if (xkey >= 'P' && xkey <= 'S')
                        p += sprintf((char *) p, "\x1B%c", xkey);
                    else
                        p += sprintf((char *) p, "\x1B?%c", xkey);
                }
                else
                    p += sprintf((char *) p, "\x1BO%c", xkey);
                return p - output;
            }
        }

        if (wParam == VK_BACK && shift_state == 0)
        {
            /* Backspace */
            *p++ = (cfg.bksp_is_delete ? 0x7F : 0x08);
            *p++ = 0;
            return -2;
        }
        if (wParam == VK_BACK && shift_state == 1)
        {
            /* Shift Backspace */
            /* We do the opposite of what is configured */
            *p++ = (cfg.bksp_is_delete ? 0x08 : 0x7F);
            *p++ = 0;
            return -2;
        }
        if (wParam == VK_TAB && shift_state == 1)
        {
            /* Shift tab */
            *p++ = 0x1B;
            *p++ = '[';
            *p++ = 'Z';
            return p - output;
        }
        if (wParam == VK_SPACE && shift_state == 2)
        {
            /* Ctrl-Space */
            *p++ = 0;
            return p - output;
        }
        if (wParam == VK_SPACE && shift_state == 3)
        {
            /* Ctrl-Shift-Space */
            *p++ = 160;
            return p - output;
        }
        if (wParam == VK_CANCEL && shift_state == 2)
        {
            /* Ctrl-Break */
            if (back)
                back->special(backhandle, TS_BRK);
            return 0;
        }
        if (wParam == VK_PAUSE)
        {
            /* Break/Pause */
            *p++ = 26;
            *p++ = 0;
            return -2;
        }
        /* Control-2 to Control-8 are special */
        if (shift_state == 2 && wParam >= '2' && wParam <= '8')
        {
            *p++ = "\000\033\034\035\036\037\177"[wParam - '2'];
            return p - output;
        }
        if (shift_state == 2 && (wParam == 0xBD || wParam == 0xBF))
        {
            *p++ = 0x1F;
            return p - output;
        }
        if (shift_state == 2 && (wParam == 0xDF || wParam == 0xDC))
        {
            *p++ = 0x1C;
            return p - output;
        }
        if (shift_state == 3 && wParam == 0xDE)
        {
            *p++ = 0x1E; /* Ctrl-~ == Ctrl-^ in xterm at least */
            return p - output;
        }
        if (shift_state == 0 && wParam == VK_RETURN && term->cr_lf_return)
        {
            *p++ = '\r';
            *p++ = '\n';
            return p - output;
        }

        /*
         * Next, all the keys that do tilde codes. (ESC '[' nn '~',
         * for integer decimal nn.)
         *
         * We also deal with the weird ones here. Linux VCs replace F1
         * to F5 by ESC [ [ A to ESC [ [ E. rxvt doesn't do _that_, but
         * does replace Home and End (1~ and 4~) by ESC [ H and ESC O w
         * respectively.
         */
        code = 0;
        switch (wParam)
        {
        case VK_F1:
            code = (keystate[VK_SHIFT] & 0x80 ? 23 : 11);
            break;
        case VK_F2:
            code = (keystate[VK_SHIFT] & 0x80 ? 24 : 12);
            break;
        case VK_F3:
            code = (keystate[VK_SHIFT] & 0x80 ? 25 : 13);
            break;
        case VK_F4:
            code = (keystate[VK_SHIFT] & 0x80 ? 26 : 14);
            break;
        case VK_F5:
            code = (keystate[VK_SHIFT] & 0x80 ? 28 : 15);
            break;
        case VK_F6:
            code = (keystate[VK_SHIFT] & 0x80 ? 29 : 17);
            break;
        case VK_F7:
            code = (keystate[VK_SHIFT] & 0x80 ? 31 : 18);
            break;
        case VK_F8:
            code = (keystate[VK_SHIFT] & 0x80 ? 32 : 19);
            break;
        case VK_F9:
            code = (keystate[VK_SHIFT] & 0x80 ? 33 : 20);
            break;
        case VK_F10:
            code = (keystate[VK_SHIFT] & 0x80 ? 34 : 21);
            break;
        case VK_F11:
            code = 23;
            break;
        case VK_F12:
            code = 24;
            break;
        case VK_F13:
            code = 25;
            break;
        case VK_F14:
            code = 26;
            break;
        case VK_F15:
            code = 28;
            break;
        case VK_F16:
            code = 29;
            break;
        case VK_F17:
            code = 31;
            break;
        case VK_F18:
            code = 32;
            break;
        case VK_F19:
            code = 33;
            break;
        case VK_F20:
            code = 34;
            break;
        }
        if ((shift_state & 2) == 0)
            switch (wParam)
            {
            case VK_HOME:
                code = 1;
                break;
            case VK_INSERT:
                code = 2;
                break;
            case VK_DELETE:
                code = 3;
                break;
            case VK_END:
                code = 4;
                break;
            case VK_PRIOR:
                code = 5;
                break;
            case VK_NEXT:
                code = 6;
                break;
            }
        /* Reorder edit keys to physical order */
        if (cfg.funky_type == FUNKY_VT400 && code <= 6)
            code = "\0\2\1\4\5\3\6"[code];

        if (term->vt52_mode && code > 0 && code <= 6)
        {
            p += sprintf((char *) p, "\x1B%c", " HLMEIG"[code]);
            return p - output;
        }

        if (cfg.funky_type == FUNKY_SCO && /* SCO function keys */
                code >= 11 && code <= 34)
        {
            char codes[] = "MNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz@[\\]^_`{";
            int index = 0;
            switch (wParam)
            {
            case VK_F1:
                index = 0;
                break;
            case VK_F2:
                index = 1;
                break;
            case VK_F3:
                index = 2;
                break;
            case VK_F4:
                index = 3;
                break;
            case VK_F5:
                index = 4;
                break;
            case VK_F6:
                index = 5;
                break;
            case VK_F7:
                index = 6;
                break;
            case VK_F8:
                index = 7;
                break;
            case VK_F9:
                index = 8;
                break;
            case VK_F10:
                index = 9;
                break;
            case VK_F11:
                index = 10;
                break;
            case VK_F12:
                index = 11;
                break;
            }
            if (keystate[VK_SHIFT] & 0x80)
                index += 12;
            if (keystate[VK_CONTROL] & 0x80)
                index += 24;
            p += sprintf((char *) p, "\x1B[%c", codes[index]);
            return p - output;
        }
        if (cfg.funky_type == FUNKY_SCO && /* SCO small keypad */
                code >= 1 && code <= 6)
        {
            char codes[] = "HL.FIG";
            if (code == 3)
            {
                *p++ = '\x7F';
            }
            else
            {
                p += sprintf((char *) p, "\x1B[%c", codes[code - 1]);
            }
            return p - output;
        }
        if ((term->vt52_mode || cfg.funky_type == FUNKY_VT100P) && code >= 11
                && code <= 24)
        {
            int offt = 0;
            if (code > 15)
                offt++;
            if (code > 21)
                offt++;
            if (term->vt52_mode)
                p += sprintf((char *) p, "\x1B%c", code + 'P' - 11 - offt);
            else
                p += sprintf((char *) p, "\x1BO%c", code + 'P' - 11 - offt);
            return p - output;
        }
        if (cfg.funky_type == FUNKY_LINUX && code >= 11 && code <= 15)
        {
            p += sprintf((char *) p, "\x1B[[%c", code + 'A' - 11);
            return p - output;
        }
        if (cfg.funky_type == FUNKY_XTERM && code >= 11 && code <= 14)
        {
            if (term->vt52_mode)
                p += sprintf((char *) p, "\x1B%c", code + 'P' - 11);
            else
                p += sprintf((char *) p, "\x1BO%c", code + 'P' - 11);
            return p - output;
        }
        if (cfg.rxvt_homeend && (code == 1 || code == 4))
        {
            p += sprintf((char *) p, code == 1 ? "\x1B[H" : "\x1BOw");
            return p - output;
        }
        if (code)
        {
            p += sprintf((char *) p, "\x1B[%d~", code);
            return p - output;
        }

        /*
         * Now the remaining keys (arrows and Keypad 5. Keypad 5 for
         * some reason seems to send VK_CLEAR to Windows...).
         */
        {
            char xkey = 0;
            switch (wParam)
            {
            case VK_UP:
                xkey = 'A';
                break;
            case VK_DOWN:
                xkey = 'B';
                break;
            case VK_RIGHT:
                xkey = 'C';
                break;
            case VK_LEFT:
                xkey = 'D';
                break;
            case VK_CLEAR:
                xkey = 'G';
                break;
            }
            if (xkey)
            {
                p += format_arrow_key(p, term, xkey, shift_state);
                return p - output;
            }
        }

        /*
         * Finally, deal with Return ourselves. (Win95 seems to
         * foul it up when Alt is pressed, for some reason.)
         */
        if (wParam == VK_RETURN)
        {
            /* Return */
            *p++ = 0x0D;
            *p++ = 0;
            return -2;
        }

        if (left_alt && wParam >= VK_NUMPAD0 && wParam <= VK_NUMPAD9)
            alt_sum = alt_sum * 10 + wParam - VK_NUMPAD0;
        else
            alt_sum = 0;
    }

    /* Okay we've done everything interesting; let windows deal with
     * the boring stuff */
    {
        BOOL capsOn = 0;

        /* helg: clear CAPS LOCK state if caps lock switches to cyrillic */
        if (cfg.xlat_capslockcyr && keystate[VK_CAPITAL] != 0)
        {
            capsOn = !left_alt;
            keystate[VK_CAPITAL] = 0;
        }

        /* XXX how do we know what the max size of the keys array should
         * be is? There's indication on MS' website of an Inquire/InquireEx
         * functioning returning a KBINFO structure which tells us. */
        if (osVersion.dwPlatformId == VER_PLATFORM_WIN32_NT)
        {
            /* XXX 'keys' parameter is declared in MSDN documentation as
             * 'LPWORD lpChar'.
             * The experience of a French user indicates that on
             * Win98, WORD[] should be passed in, but on Win2K, it should
             * be BYTE[]. German WinXP and my Win2K with "US International"
             * driver corroborate this.
             * Experimentally I've conditionalised the behaviour on the
             * Win9x/NT split, but I suspect it's worse than that.
             * See wishlist item `win-dead-keys' for more horrible detail
             * and speculations. */
            BYTE keybs[3];
            int i;
            r = ToAsciiEx(wParam, scan, keystate, (LPWORD) keybs, 0, kbd_layout);
            for (i = 0; i < 3; i++)
                keys[i] = keybs[i];
        }
        else
        {
            r = ToAsciiEx(wParam, scan, keystate, keys, 0, kbd_layout);
        }
#ifdef SHOW_TOASCII_RESULT
        if (r == 1 && !key_down)
        {
            if (alt_sum)
            {
                if (in_utf(term) || ucsdata.dbcs_screenfont)
                    debug((", (U+%04x)", alt_sum));
                else
                    debug((", LCH(%d)", alt_sum));
            }
            else
            {
                debug((", ACH(%d)", keys[0]));
            }
        }
        else if (r > 0)
        {
            int r1;
            debug((", ASC("));
            for (r1 = 0; r1 < r; r1++)
            {
                debug(("%s%d", r1 ? "," : "", keys[r1]));
            }
            debug((")"));
        }
#endif
        if (r > 0)
        {
            WCHAR keybuf;

            /*
             * Interrupt an ongoing paste. I'm not sure this is
             * sensible, but for the moment it's preferable to
             * having to faff about buffering things.
             */
            term_nopaste(term);

            p = output;
            for (i = 0; i < r; i++)
            {
                unsigned char ch = (unsigned char) keys[i];

                if (compose_state == 2 && (ch & 0x80) == 0 && ch > ' ')
                {
                    compose_char = ch;
                    compose_state++;
                    continue;
                }
                if (compose_state == 3 && (ch & 0x80) == 0 && ch > ' ')
                {
                    int nc;
                    compose_state = 0;

                    if ((nc = check_compose(compose_char, ch)) == -1)
                    {
                        MessageBeep(MB_ICONHAND);
                        return 0;
                    }
                    keybuf = nc;
                    term_seen_key_event(term);
                    if (ldisc)
                        luni_send(ldisc, &keybuf, 1, 1);
                    continue;
                }

                compose_state = 0;

                if (!key_down)
                {
                    if (alt_sum)
                    {
                        if (in_utf(term) || ucsdata.dbcs_screenfont)
                        {
                            keybuf = alt_sum;
                            term_seen_key_event(term);
                            if (ldisc)
                                luni_send(ldisc, &keybuf, 1, 1);
                        }
                        else
                        {
                            ch = (char) alt_sum;
                            /*
                             * We need not bother about stdin
                             * backlogs here, because in GUI PuTTY
                             * we can't do anything about it
                             * anyway; there's no means of asking
                             * Windows to hold off on KEYDOWN
                             * messages. We _have_ to buffer
                             * everything we're sent.
                             */
                            term_seen_key_event(term);
                            if (ldisc)
                                ldisc_send(ldisc, &ch, 1, 1);
                        }
                        alt_sum = 0;
                    }
                    else
                    {
                        term_seen_key_event(term);
                        if (ldisc)
                            lpage_send(ldisc, kbd_codepage, &ch, 1, 1);
                    }
                }
                else
                {
                    if (capsOn && ch < 0x80)
                    {
                        WCHAR cbuf[2];
                        cbuf[0] = 27;
                        cbuf[1] = xlat_uskbd2cyrllic(ch);
                        term_seen_key_event(term);
                        if (ldisc)
                            luni_send(ldisc, cbuf + !left_alt, 1 + !!left_alt, 1);
                    }
                    else
                    {
                        char cbuf[2];
                        cbuf[0] = '\033';
                        cbuf[1] = ch;
                        term_seen_key_event(term);
                        if (ldisc)
                            lpage_send(ldisc, kbd_codepage, cbuf + !left_alt, 1 + !!left_alt, 1);
                    }
                }
                show_mouseptr(0);
            }

            /* This is so the ALT-Numpad and dead keys work correctly. */
            keys[0] = 0;

            return p - output;
        }
        /* If we're definitly not building up an ALT-54321 then clear it */
        if (!left_alt)
            keys[0] = 0;
        /* If we will be using alt_sum fix the 256s */
        else if (keys[0] && (in_utf(term) || ucsdata.dbcs_screenfont))
            keys[0] = 10;
    }

    /*
     * ALT alone may or may not want to bring up the System menu.
     * If it's not meant to, we return 0 on presses or releases of
     * ALT, to show that we've swallowed the keystroke. Otherwise
     * we return -1, which means Windows will give the keystroke
     * its default handling (i.e. bring up the System menu).
     */
    if (wParam == VK_MENU && !cfg.alt_only)
        return 0;

    return -1;
}

void set_title(void *frontend, char *title)
{
    sfree(window_name);
    window_name = snewn(1 + strlen(title), char);
    strcpy(window_name, title);
    if (cfg.win_name_always || !IsIconic(hwnd))
        SetWindowText(hwnd, title);
}

void set_icon(void *frontend, char *title)
{
    sfree(icon_name);
    icon_name = snewn(1 + strlen(title), char);
    strcpy(icon_name, title);
    if (!cfg.win_name_always && IsIconic(hwnd))
        SetWindowText(hwnd, title);
}

void set_sbar(void *frontend, int total, int start, int page)
{
    SCROLLINFO si;

    if (is_full_screen() ? !cfg.scrollbar_in_fullscreen : !cfg.scrollbar)
        return;

    si.cbSize = sizeof(si);
    si.fMask = SIF_ALL | SIF_DISABLENOSCROLL;
    si.nMin = 0;
    si.nMax = total - 1;
    si.nPage = page;
    si.nPos = start;
    if (hwnd)
        SetScrollInfo(hwnd, SB_VERT, &si, TRUE);
}

Context get_ctx(void *frontend)
{
    HDC hdc;
    if (hwnd)
    {
        hdc = GetDC(hwnd);
        if (hdc && pal)
            SelectPalette(hdc, pal, FALSE);
        return hdc;
    }
    else
        return NULL;
}

void free_ctx(Context ctx)
{
    SelectPalette(ctx, GetStockObject(DEFAULT_PALETTE), FALSE);
    ReleaseDC(hwnd, ctx);
}

static void real_palette_set(int n, int r, int g, int b)
{
    if (pal)
    {
        logpal->palPalEntry[n].peRed = r;
        logpal->palPalEntry[n].peGreen = g;
        logpal->palPalEntry[n].peBlue = b;
        logpal->palPalEntry[n].peFlags = PC_NOCOLLAPSE;
        colours[n] = PALETTERGB(r, g, b);
        SetPaletteEntries(pal, 0, NALLCOLOURS, logpal->palPalEntry);
    }
    else
        colours[n] = RGB(r, g, b);
}

void palette_set(void *frontend, int n, int r, int g, int b)
{
    if (n >= 16)
        n += 256 - 16;
    if (n > NALLCOLOURS)
        return;
    real_palette_set(n, r, g, b);
    if (pal)
    {
        HDC hdc = get_ctx(frontend);
        UnrealizeObject(pal);
        RealizePalette(hdc);
        free_ctx(hdc);
    }
    else
    {
        if (n == (ATTR_DEFBG >> ATTR_BGSHIFT))
            /* If Default Background changes, we need to ensure any
             * space between the text area and the window border is
             * redrawn. */
            InvalidateRect(hwnd, NULL, TRUE);
    }
}

void palette_reset(void *frontend)
{
    int i;

    /* And this */
    for (i = 0; i < NALLCOLOURS; i++)
    {
        if (pal)
        {
            logpal->palPalEntry[i].peRed = defpal[i].rgbtRed;
            logpal->palPalEntry[i].peGreen = defpal[i].rgbtGreen;
            logpal->palPalEntry[i].peBlue = defpal[i].rgbtBlue;
            logpal->palPalEntry[i].peFlags = 0;
            colours[i] = PALETTERGB(defpal[i].rgbtRed, defpal[i].rgbtGreen,
                                    defpal[i].rgbtBlue);
        }
        else
            colours[i] = RGB(defpal[i].rgbtRed, defpal[i].rgbtGreen, defpal[i].rgbtBlue);
    }

    if (pal)
    {
        HDC hdc;
        SetPaletteEntries(pal, 0, NALLCOLOURS, logpal->palPalEntry);
        hdc = get_ctx(frontend);
        RealizePalette(hdc);
        free_ctx(hdc);
    }
    else
    {
        /* Default Background may have changed. Ensure any space between
         * text area and window border is redrawn. */
        InvalidateRect(hwnd, NULL, TRUE);
    }
}

void write_aclip(void *frontend, char *data, int len, int must_deselect)
{
    HGLOBAL clipdata;
    void *lock;

    clipdata = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, len + 1);
    if (!clipdata)
        return;
    lock = GlobalLock(clipdata);
    if (!lock)
        return;
    memcpy(lock, data, len);
    ((unsigned char *) lock)[len] = 0;
    GlobalUnlock(clipdata);

    if (!must_deselect)
        SendMessage(hwnd, WM_IGNORE_CLIP, TRUE, 0);

    if (OpenClipboard(hwnd))
    {
        EmptyClipboard();
        SetClipboardData(CF_TEXT, clipdata);
        CloseClipboard();
    }
    else
        GlobalFree(clipdata);

    if (!must_deselect)
        SendMessage(hwnd, WM_IGNORE_CLIP, FALSE, 0);
}

/*
 * Note: unlike write_aclip() this will not append a nul.
 */
void write_clip(void *frontend, wchar_t *data, int *attr, int len,
                int must_deselect)
{
    HGLOBAL clipdata, clipdata2, clipdata3;
    int len2;
    void *lock, *lock2, *lock3;

    len2 = WideCharToMultiByte(CP_ACP, 0, data, len, 0, 0, NULL, NULL);

    clipdata = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, len * sizeof(wchar_t));
    clipdata2 = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, len2);

    if (!clipdata || !clipdata2)
    {
        if (clipdata)
            GlobalFree(clipdata);
        if (clipdata2)
            GlobalFree(clipdata2);
        return;
    }
    if (!(lock = GlobalLock(clipdata)))
        return;
    if (!(lock2 = GlobalLock(clipdata2)))
        return;

    memcpy(lock, data, len * sizeof(wchar_t));
    WideCharToMultiByte(CP_ACP, 0, data, len, lock2, len2, NULL, NULL);

    if (cfg.rtf_paste)
    {
        wchar_t unitab[256];
        char *rtf = NULL;
        unsigned char *tdata = (unsigned char *) lock2;
        wchar_t *udata = (wchar_t *) lock;
        int rtflen = 0, uindex = 0, tindex = 0;
        int rtfsize = 0;
        int multilen, blen, alen, totallen, i;
        char before[16], after[4];
        int fgcolour, lastfgcolour = 0;
        int bgcolour, lastbgcolour = 0;
        int attrBold, lastAttrBold = 0;
        int attrUnder, lastAttrUnder = 0;
        int palette[NALLCOLOURS];
        int numcolours;

        get_unitab(CP_ACP, unitab, 0);

        rtfsize = 100 + strlen(cfg.font.name);
        rtf = snewn(rtfsize, char);
        rtflen = sprintf(rtf,
                         "{\\rtf1\\ansi\\deff0{\\fonttbl\\f0\\fmodern %s;}\\f0\\fs%d", cfg.font.name,
                         cfg.font.height * 2);

        /*
         * Add colour palette
         * {\colortbl ;\red255\green0\blue0;\red0\green0\blue128;}
         */

        /*
         * First - Determine all colours in use
         *    o  Foregound and background colours share the same palette
         */
        if (attr)
        {
            memset(palette, 0, sizeof(palette));
            for (i = 0; i < (len - 1); i++)
            {
                fgcolour = ((attr[i] & ATTR_FGMASK) >> ATTR_FGSHIFT);
                bgcolour = ((attr[i] & ATTR_BGMASK) >> ATTR_BGSHIFT);

                if (attr[i] & ATTR_REVERSE)
                {
                    int tmpcolour = fgcolour; /* Swap foreground and background */
                    fgcolour = bgcolour;
                    bgcolour = tmpcolour;
                }

                if (bold_mode == BOLD_COLOURS && (attr[i] & ATTR_BOLD))
                {
                    if (fgcolour < 8) /* ANSI colours */
                        fgcolour += 8;
                    else if (fgcolour >= 256) /* Default colours */
                        fgcolour++;
                }

                if (attr[i] & ATTR_BLINK)
                {
                    if (bgcolour < 8) /* ANSI colours */
                        bgcolour += 8;
                    else if (bgcolour >= 256) /* Default colours */
                        bgcolour++;
                }

                palette[fgcolour]++;
                palette[bgcolour]++;
            }

            /*
             * Next - Create a reduced palette
             */
            numcolours = 0;
            for (i = 0; i < NALLCOLOURS; i++)
            {
                if (palette[i] != 0)
                    palette[i] = ++numcolours;
            }

            /*
             * Finally - Write the colour table
             */
            rtf = sresize(rtf, rtfsize + (numcolours * 25), char);
            strcat(rtf, "{\\colortbl ;");
            rtflen = strlen(rtf);

            for (i = 0; i < NALLCOLOURS; i++)
            {
                if (palette[i] != 0)
                {
                    rtflen += sprintf(&rtf[rtflen], "\\red%d\\green%d\\blue%d;", defpal[i].rgbtRed,
                                      defpal[i].rgbtGreen, defpal[i].rgbtBlue);
                }
            }
            strcpy(&rtf[rtflen], "}");
            rtflen++;
        }

        /*
         * We want to construct a piece of RTF that specifies the
         * same Unicode text. To do this we will read back in
         * parallel from the Unicode data in `udata' and the
         * non-Unicode data in `tdata'. For each character in
         * `tdata' which becomes the right thing in `udata' when
         * looked up in `unitab', we just copy straight over from
         * tdata. For each one that doesn't, we must WCToMB it
         * individually and produce a \u escape sequence.
         *
         * It would probably be more robust to just bite the bullet
         * and WCToMB each individual Unicode character one by one,
         * then MBToWC each one back to see if it was an accurate
         * translation; but that strikes me as a horrifying number
         * of Windows API calls so I want to see if this faster way
         * will work. If it screws up badly we can always revert to
         * the simple and slow way.
         */
        while (tindex < len2 && uindex < len && tdata[tindex] && udata[uindex])
        {
            if (tindex + 1 < len2 && tdata[tindex] == '\r' && tdata[tindex + 1] == '\n')
            {
                tindex++;
                uindex++;
            }

            /*
             * Set text attributes
             */
            if (attr)
            {
                if (rtfsize < rtflen + 64)
                {
                    rtfsize = rtflen + 512;
                    rtf = sresize(rtf, rtfsize, char);
                }

                /*
                 * Determine foreground and background colours
                 */
                fgcolour = ((attr[tindex] & ATTR_FGMASK) >> ATTR_FGSHIFT);
                bgcolour = ((attr[tindex] & ATTR_BGMASK) >> ATTR_BGSHIFT);

                if (attr[tindex] & ATTR_REVERSE)
                {
                    int tmpcolour = fgcolour; /* Swap foreground and background */
                    fgcolour = bgcolour;
                    bgcolour = tmpcolour;
                }

                if (bold_mode == BOLD_COLOURS && (attr[tindex] & ATTR_BOLD))
                {
                    if (fgcolour < 8) /* ANSI colours */
                        fgcolour += 8;
                    else if (fgcolour >= 256) /* Default colours */
                        fgcolour++;
                }

                if (attr[tindex] & ATTR_BLINK)
                {
                    if (bgcolour < 8) /* ANSI colours */
                        bgcolour += 8;
                    else if (bgcolour >= 256) /* Default colours */
                        bgcolour++;
                }

                /*
                 * Collect other attributes
                 */
                if (bold_mode != BOLD_COLOURS)
                    attrBold = attr[tindex] & ATTR_BOLD;
                else
                    attrBold = 0;

                attrUnder = attr[tindex] & ATTR_UNDER;

                /*
                 * Reverse video
                 *   o  If video isn't reversed, ignore colour attributes for default foregound
                 *	or background.
                 *   o  Special case where bolded text is displayed using the default foregound
                 *      and background colours - force to bolded RTF.
                 */
                if (!(attr[tindex] & ATTR_REVERSE))
                {
                    if (bgcolour >= 256) /* Default color */
                        bgcolour = -1; /* No coloring */

                    if (fgcolour >= 256)
                    {
                        /* Default colour */
                        if (bold_mode == BOLD_COLOURS && (fgcolour & 1) && bgcolour == -1)
                            attrBold = ATTR_BOLD; /* Emphasize text with bold attribute */

                        fgcolour = -1; /* No coloring */
                    }
                }

                /*
                 * Write RTF text attributes
                 */
                if (lastfgcolour != fgcolour)
                {
                    lastfgcolour = fgcolour;
                    rtflen += sprintf(&rtf[rtflen], "\\cf%d ",
                                      (fgcolour >= 0) ? palette[fgcolour] : 0);
                }

                if (lastbgcolour != bgcolour)
                {
                    lastbgcolour = bgcolour;
                    rtflen += sprintf(&rtf[rtflen], "\\highlight%d ",
                                      (bgcolour >= 0) ? palette[bgcolour] : 0);
                }

                if (lastAttrBold != attrBold)
                {
                    lastAttrBold = attrBold;
                    rtflen += sprintf(&rtf[rtflen], "%s", attrBold ? "\\b " : "\\b0 ");
                }

                if (lastAttrUnder != attrUnder)
                {
                    lastAttrUnder = attrUnder;
                    rtflen += sprintf(&rtf[rtflen], "%s", attrUnder ? "\\ul " : "\\ulnone ");
                }
            }

            if (unitab[tdata[tindex]] == udata[uindex])
            {
                multilen = 1;
                before[0] = '\0';
                after[0] = '\0';
                blen = alen = 0;
            }
            else
            {
                multilen = WideCharToMultiByte(CP_ACP, 0, unitab + uindex, 1, NULL, 0, NULL,
                                               NULL);
                if (multilen != 1)
                {
                    blen = sprintf(before, "{\\uc%d\\u%d", multilen, udata[uindex]);
                    alen = 1;
                    strcpy(after, "}");
                }
                else
                {
                    blen = sprintf(before, "\\u%d", udata[uindex]);
                    alen = 0;
                    after[0] = '\0';
                }
            }
            assert(tindex + multilen <= len2);
            totallen = blen + alen;
            for (i = 0; i < multilen; i++)
            {
                if (tdata[tindex + i] == '\\' || tdata[tindex + i] == '{'
                        || tdata[tindex + i] == '}')
                    totallen += 2;
                else if (tdata[tindex + i] == 0x0D || tdata[tindex + i] == 0x0A)
                    totallen += 6; /* \par\r\n */
                else if (tdata[tindex + i] > 0x7E || tdata[tindex + i] < 0x20)
                    totallen += 4;
                else
                    totallen++;
            }

            if (rtfsize < rtflen + totallen + 3)
            {
                rtfsize = rtflen + totallen + 512;
                rtf = sresize(rtf, rtfsize, char);
            }

            strcpy(rtf + rtflen, before);
            rtflen += blen;
            for (i = 0; i < multilen; i++)
            {
                if (tdata[tindex + i] == '\\' || tdata[tindex + i] == '{'
                        || tdata[tindex + i] == '}')
                {
                    rtf[rtflen++] = '\\';
                    rtf[rtflen++] = tdata[tindex + i];
                }
                else if (tdata[tindex + i] == 0x0D || tdata[tindex + i] == 0x0A)
                {
                    rtflen += sprintf(rtf + rtflen, "\\par\r\n");
                }
                else if (tdata[tindex + i] > 0x7E || tdata[tindex + i] < 0x20)
                {
                    rtflen += sprintf(rtf + rtflen, "\\'%02x", tdata[tindex + i]);
                }
                else
                {
                    rtf[rtflen++] = tdata[tindex + i];
                }
            }
            strcpy(rtf + rtflen, after);
            rtflen += alen;

            tindex += multilen;
            uindex++;
        }

        rtf[rtflen++] = '}'; /* Terminate RTF stream */
        rtf[rtflen++] = '\0';
        rtf[rtflen++] = '\0';

        clipdata3 = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, rtflen);
        if (clipdata3 && (lock3 = GlobalLock(clipdata3)) != NULL)
        {
            memcpy(lock3, rtf, rtflen);
            GlobalUnlock(clipdata3);
        }
        sfree(rtf);
    }
    else
        clipdata3 = NULL;

    GlobalUnlock(clipdata);
    GlobalUnlock(clipdata2);

    if (!must_deselect)
        SendMessage(hwnd, WM_IGNORE_CLIP, TRUE, 0);

    if (OpenClipboard(hwnd))
    {
        EmptyClipboard();
        SetClipboardData(CF_UNICODETEXT, clipdata);
        SetClipboardData(CF_TEXT, clipdata2);
        if (clipdata3)
            SetClipboardData(RegisterClipboardFormat(CF_RTF), clipdata3);
        CloseClipboard();
    }
    else
    {
        GlobalFree(clipdata);
        GlobalFree(clipdata2);
    }

    if (!must_deselect)
        SendMessage(hwnd, WM_IGNORE_CLIP, FALSE, 0);
}

static DWORD WINAPI clipboard_read_threadfunc(void *param)
{
    HWND hwnd = (HWND) param;
    HGLOBAL clipdata;

    if (OpenClipboard(NULL))
    {
        if ((clipdata = GetClipboardData(CF_UNICODETEXT)))
        {
            SendMessage(hwnd, WM_GOT_CLIPDATA, (WPARAM) 1, (LPARAM) clipdata);
        }
        else if ((clipdata = GetClipboardData(CF_TEXT)))
        {
            SendMessage(hwnd, WM_GOT_CLIPDATA, (WPARAM) 0, (LPARAM) clipdata);
        }
        CloseClipboard();
    }

    return 0;
}

static int process_clipdata(HGLOBAL clipdata, int unicode)
{
    sfree(clipboard_contents);
    clipboard_contents = NULL;
    clipboard_length = 0;

    if (unicode)
    {
        wchar_t *p = GlobalLock(clipdata);
        wchar_t *p2;

        if (p)
        {
            /* Unwilling to rely on Windows having wcslen() */
            for (p2 = p; *p2; p2++)
                ;
            clipboard_length = p2 - p;
            clipboard_contents = snewn(clipboard_length + 1, wchar_t);
            memcpy(clipboard_contents, p, clipboard_length * sizeof(wchar_t));
            clipboard_contents[clipboard_length] = L'\0';
            return TRUE;
        }
    }
    else
    {
        char *s = GlobalLock(clipdata);
        int i;

        if (s)
        {
            i = MultiByteToWideChar(CP_ACP, 0, s, strlen(s) + 1, 0, 0);
            clipboard_contents = snewn(i, wchar_t);
            MultiByteToWideChar(CP_ACP, 0, s, strlen(s) + 1, clipboard_contents, i);
            clipboard_length = i - 1;
            clipboard_contents[clipboard_length] = L'\0';
            return TRUE;
        }
    }

    return FALSE;
}

void request_paste(void *frontend)
{
    /*
     * I always thought pasting was synchronous in Windows; the
     * clipboard access functions certainly _look_ synchronous,
     * unlike the X ones. But in fact it seems that in some
     * situations the contents of the clipboard might not be
     * immediately available, and the clipboard-reading functions
     * may block. This leads to trouble if the application
     * delivering the clipboard data has to get hold of it by -
     * for example - talking over a network connection which is
     * forwarded through this very PuTTY.
     *
     * Hence, we spawn a subthread to read the clipboard, and do
     * our paste when it's finished. The thread will send a
     * message back to our main window when it terminates, and
     * that tells us it's OK to paste.
     */
    DWORD in_threadid; /* required for Win9x */
    CreateThread(NULL, 0, clipboard_read_threadfunc, hwnd, 0, &in_threadid);
}

void get_clip(void *frontend, wchar_t **p, int *len)
{
    if (p)
    {
        *p = clipboard_contents;
        *len = clipboard_length;
    }
}

#if 0
/*
 * Move `lines' lines from position `from' to position `to' in the
 * window.
 */
void optimised_move(void *frontend, int to, int from, int lines)
{
    RECT r;
    int min, max;

    min = (to < from ? to : from);
    max = to + from - min;

    r.left = offset_width;
    r.right = offset_width + term->cols * font_width;
    r.top = offset_height + min * font_height;
    r.bottom = offset_height + (max + lines) * font_height;
    ScrollWindow(hwnd, 0, (to - from) * font_height, &r, &r);
}
#endif

/*
 * Print a message box and perform a fatal exit.
 */
void fatalbox(char *fmt, ...)
{
    va_list ap;
    char *stuff, morestuff[100];

    va_start(ap, fmt);
    stuff = dupvprintf(fmt, ap);
    va_end(ap);
    sprintf(morestuff, "%.70s Fatal Error", appname);
    MessageBox(hwnd, stuff, morestuff, MB_ICONERROR | MB_OK);
    sfree(stuff);
    cleanup_exit(1);
}

/*
 * Print a modal (Really Bad) message box and perform a fatal exit.
 */
void modalfatalbox(char *fmt, ...)
{
    va_list ap;
    char *stuff, morestuff[100];

    va_start(ap, fmt);
    stuff = dupvprintf(fmt, ap);
    va_end(ap);
    sprintf(morestuff, "%.70s Fatal Error", appname);
    MessageBox(hwnd, stuff, morestuff, MB_SYSTEMMODAL | MB_ICONERROR | MB_OK);
    sfree(stuff);
    cleanup_exit(1);
}

DECL_WINDOWS_FUNCTION(static, BOOL, FlashWindowEx, (PFLASHWINFO));

static void init_flashwindow(void)
{
    HMODULE user32_module = load_system32_dll("user32.dll");
    GET_WINDOWS_FUNCTION(user32_module, FlashWindowEx);
}

static BOOL flash_window_ex(DWORD dwFlags, UINT uCount, DWORD dwTimeout)
{
    if (p_FlashWindowEx)
    {
        FLASHWINFO fi;
        fi.cbSize = sizeof(fi);
        fi.hwnd = hwnd;
        fi.dwFlags = dwFlags;
        fi.uCount = uCount;
        fi.dwTimeout = dwTimeout;
        return (*p_FlashWindowEx)(&fi);
    }
    else
        return FALSE; /* shrug */
}

static void flash_window(int mode);
static long next_flash;
static int flashing = 0;

/*
 * Timer for platforms where we must maintain window flashing manually
 * (e.g., Win95).
 */
static void flash_window_timer(void *ctx, long now)
{
    if (flashing && now - next_flash >= 0)
    {
        flash_window(1);
    }
}

/*
 * Manage window caption / taskbar flashing, if enabled.
 * 0 = stop, 1 = maintain, 2 = start
 */
static void flash_window(int mode)
{
    if ((mode == 0) || (cfg.beep_ind == B_IND_DISABLED))
    {
        /* stop */
        if (flashing)
        {
            flashing = 0;
            if (p_FlashWindowEx)
                flash_window_ex(FLASHW_STOP, 0, 0);
            else
                FlashWindow(hwnd, FALSE);
        }

    }
    else if (mode == 2)
    {
        /* start */
        if (!flashing)
        {
            flashing = 1;
            if (p_FlashWindowEx)
            {
                /* For so-called "steady" mode, we use uCount=2, which
                 * seems to be the traditional number of flashes used
                 * by user notifications (e.g., by Explorer).
                 * uCount=0 appears to enable continuous flashing, per
                 * "flashing" mode, although I haven't seen this
                 * documented. */
                flash_window_ex(FLASHW_ALL | FLASHW_TIMER,
                                (cfg.beep_ind == B_IND_FLASH ? 0 : 2), 0 /* system cursor blink rate */);
                /* No need to schedule timer */
            }
            else
            {
                FlashWindow(hwnd, TRUE);
                next_flash = schedule_timer(450, flash_window_timer, hwnd);
            }
        }

    }
    else if ((mode == 1) && (cfg.beep_ind == B_IND_FLASH))
    {
        /* maintain */
        if (flashing && !p_FlashWindowEx)
        {
            FlashWindow(hwnd, TRUE); /* toggle */
            next_flash = schedule_timer(450, flash_window_timer, hwnd);
        }
    }
}

/*
 * Beep.
 */
void do_beep(void *frontend, int mode)
{
    if (mode == BELL_DEFAULT)
    {
        /*
         * For MessageBeep style bells, we want to be careful of
         * timing, because they don't have the nice property of
         * PlaySound bells that each one cancels the previous
         * active one. So we limit the rate to one per 50ms or so.
         */
        static long lastbeep = 0;
        long beepdiff;

        beepdiff = GetTickCount() - lastbeep;
        if (beepdiff >= 0 && beepdiff < 50)
            return;
        MessageBeep(MB_OK);
        /*
         * The above MessageBeep call takes time, so we record the
         * time _after_ it finishes rather than before it starts.
         */
        lastbeep = GetTickCount();
    }
    else if (mode == BELL_WAVEFILE)
    {
        if (!PlaySound(cfg.bell_wavefile.path, NULL, SND_ASYNC | SND_FILENAME))
        {
            char buf[sizeof(cfg.bell_wavefile.path) + 80];
            char otherbuf[100];
            sprintf(buf, "Unable to play sound file\n%s\n"
                    "Using default sound instead", cfg.bell_wavefile.path);
            sprintf(otherbuf, "%.70s Sound Error", appname);
            MessageBox(hwnd, buf, otherbuf, MB_OK | MB_ICONEXCLAMATION);
            cfg.beep = BELL_DEFAULT;
        }
    }
    else if (mode == BELL_PCSPEAKER)
    {
        static long lastbeep = 0;
        long beepdiff;

        beepdiff = GetTickCount() - lastbeep;
        if (beepdiff >= 0 && beepdiff < 50)
            return;

        /*
         * We must beep in different ways depending on whether this
         * is a 95-series or NT-series OS.
         */
        if (osVersion.dwPlatformId == VER_PLATFORM_WIN32_NT)
            Beep(800, 100);
        else
            MessageBeep(-1);
        lastbeep = GetTickCount();
    }
    /* Otherwise, either visual bell or disabled; do nothing here */
    if (!term->has_focus)
    {
        flash_window(2); /* start */
    }
}

/*
 * Minimise or restore the window in response to a server-side
 * request.
 */
void set_iconic(void *frontend, int iconic)
{
    if (IsIconic(hwnd))
    {
        if (!iconic)
            ShowWindow(hwnd, SW_RESTORE);
    }
    else
    {
        if (iconic)
            ShowWindow(hwnd, SW_MINIMIZE);
    }
}

/*
 * Move the window in response to a server-side request.
 */
void move_window(void *frontend, int x, int y)
{
    if (cfg.resize_action == RESIZE_DISABLED || cfg.resize_action == RESIZE_FONT
            || IsZoomed(hwnd))
        return;

    SetWindowPos(hwnd, NULL, x, y, 0, 0, SWP_NOSIZE | SWP_NOZORDER);
}

/*
 * Move the window to the top or bottom of the z-order in response
 * to a server-side request.
 */
void set_zorder(void *frontend, int top)
{
    if (cfg.alwaysontop)
        return; /* ignore */
    SetWindowPos(hwnd, top ? HWND_TOP : HWND_BOTTOM, 0, 0, 0, 0,
                 SWP_NOMOVE | SWP_NOSIZE);
}

/*
 * Refresh the window in response to a server-side request.
 */
void refresh_window(void *frontend)
{
    InvalidateRect(hwnd, NULL, TRUE);
}

/*
 * Maximise or restore the window in response to a server-side
 * request.
 */
void set_zoomed(void *frontend, int zoomed)
{
    if (IsZoomed(hwnd))
    {
        if (!zoomed)
            ShowWindow(hwnd, SW_RESTORE);
    }
    else
    {
        if (zoomed)
            ShowWindow(hwnd, SW_MAXIMIZE);
    }
}

/*
 * Report whether the window is iconic, for terminal reports.
 */
int is_iconic(void *frontend)
{
    return IsIconic(hwnd);
}

/*
 * Report the window's position, for terminal reports.
 */
void get_window_pos(void *frontend, int *x, int *y)
{
    RECT r;
    GetWindowRect(hwnd, &r);
    *x = r.left;
    *y = r.top;
}

/*
 * Report the window's pixel size, for terminal reports.
 */
void get_window_pixels(void *frontend, int *x, int *y)
{
    RECT r;
    GetWindowRect(hwnd, &r);
    *x = r.right - r.left;
    *y = r.bottom - r.top;
}

/*
 * Return the window or icon title.
 */
char *get_window_title(void *frontend, int icon)
{
    return icon ? icon_name : window_name;
}

/*
 * See if we're in full-screen mode.
 */
static int is_full_screen()
{
    if (!IsZoomed(hwnd))
        return FALSE;
    if (GetWindowLongPtr(hwnd, GWL_STYLE) & WS_CAPTION)
        return FALSE;
    return TRUE;
}

/* Get the rect/size of a full screen window using the nearest available
 * monitor in multimon systems; default to something sensible if only
 * one monitor is present. */
static int get_fullscreen_rect(RECT *ss)
{
#if defined(MONITOR_DEFAULTTONEAREST) && !defined(NO_MULTIMON)
    HMONITOR mon;
    MONITORINFO mi;
    mon = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
    mi.cbSize = sizeof(mi);
    GetMonitorInfo(mon, &mi);

    /* structure copy */
    *ss = mi.rcMonitor;
    return TRUE;
#else
    /* could also use code like this:
     ss->left = ss->top = 0;
     ss->right = GetSystemMetrics(SM_CXSCREEN);
     ss->bottom = GetSystemMetrics(SM_CYSCREEN);
     */
    return GetClientRect(GetDesktopWindow(), ss);
#endif
}

/*
 * Go full-screen. This should only be called when we are already
 * maximised.
 */
static void make_full_screen()
{
    DWORD style;
    RECT ss;

    assert(IsZoomed(hwnd));

    if (is_full_screen())
        return;

    /* Remove the window furniture. */
    style = GetWindowLongPtr(hwnd, GWL_STYLE);
    style &= ~(WS_CAPTION | WS_BORDER | WS_THICKFRAME);
    if (cfg.scrollbar_in_fullscreen)
        style |= WS_VSCROLL;
    else
        style &= ~WS_VSCROLL;
    SetWindowLongPtr(hwnd, GWL_STYLE, style);

    /* Resize ourselves to exactly cover the nearest monitor. */
    get_fullscreen_rect(&ss);
    SetWindowPos(hwnd, HWND_TOP, ss.left, ss.top, ss.right - ss.left,
                 ss.bottom - ss.top, SWP_FRAMECHANGED);

    /* We may have changed size as a result */

    reset_window(0);

    /* Tick the menu item in the System and context menus. */
    {
        int i;
        for (i = 0; i < lenof(popup_menus); i++)
            CheckMenuItem(popup_menus[i].menu, IDM_FULLSCREEN, MF_CHECKED);
    }
}

/*
 * Clear the full-screen attributes.
 */
static void clear_full_screen()
{
    DWORD oldstyle, style;

    /* Reinstate the window furniture. */
    style = oldstyle = GetWindowLongPtr(hwnd, GWL_STYLE);
    style |= WS_CAPTION | WS_BORDER;
    if (cfg.resize_action == RESIZE_DISABLED)
        style &= ~WS_THICKFRAME;
    else
        style |= WS_THICKFRAME;
    if (cfg.scrollbar)
        style |= WS_VSCROLL;
    else
        style &= ~WS_VSCROLL;
    if (style != oldstyle)
    {
        SetWindowLongPtr(hwnd, GWL_STYLE, style);
        SetWindowPos(hwnd, NULL, 0, 0, 0, 0,
                     SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | SWP_FRAMECHANGED);
    }

    /* Untick the menu item in the System and context menus. */
    {
        int i;
        for (i = 0; i < lenof(popup_menus); i++)
            CheckMenuItem(popup_menus[i].menu, IDM_FULLSCREEN, MF_UNCHECKED);
    }
}

/*
 * Toggle full-screen mode.
 */
static void flip_full_screen()
{
    if (is_full_screen())
    {
        ShowWindow(hwnd, SW_RESTORE);
    }
    else if (IsZoomed(hwnd))
    {
        make_full_screen();
    }
    else
    {
        SendMessage(hwnd, WM_FULLSCR_ON_MAX, 0, 0);
        ShowWindow(hwnd, SW_MAXIMIZE);
    }
}

void frontend_keypress(void *handle)
{
    /*
     * Keypress termination in non-Close-On-Exit mode is not
     * currently supported in PuTTY proper, because the window
     * always has a perfectly good Close button anyway. So we do
     * nothing here.
     */
    return;
}

int from_backend(void *frontend, int is_stderr, const char *data, int len)
{
    return term_data(term, is_stderr, data, len);
}

int from_backend_untrusted(void *frontend, const char *data, int len)
{
    return term_data_untrusted(term, data, len);
}

int get_userpass_input(prompts_t *p, unsigned char *in, int inlen)
{
    int ret;
    ret = cmdline_get_passwd_input(p, in, inlen);
    if (ret == -1)
        ret = term_get_userpass_input(term, p, in, inlen);
    return ret;
}

void agent_schedule_callback(void(*callback)(void *, void *, int),
                             void *callback_ctx, void *data, int len)
{
    struct agent_callback *c = snew(struct agent_callback);
    c->callback = callback;
    c->callback_ctx = callback_ctx;
    c->data = data;
    c->len = len;
    PostMessage(hwnd, WM_AGENT_CALLBACK, 0, (LPARAM) c);
}
